diff --git a/recipe_modules/flutter_bcid/__init__.py b/recipe_modules/flutter_bcid/__init__.py
index 033f58b..c790b26 100644
--- a/recipe_modules/flutter_bcid/__init__.py
+++ b/recipe_modules/flutter_bcid/__init__.py
@@ -3,12 +3,9 @@
 # found in the LICENSE file.
 
 DEPS = [
-    'dart/dart',
-    'depot_tools/gsutil',
     'flutter/repo_util',
     'recipe_engine/bcid_reporter',
     'recipe_engine/buildbucket',
     'recipe_engine/file',
-    'recipe_engine/path',
     'recipe_engine/platform',
 ]
diff --git a/recipe_modules/flutter_bcid/api.py b/recipe_modules/flutter_bcid/api.py
index 9481d1a..3ab2a52 100644
--- a/recipe_modules/flutter_bcid/api.py
+++ b/recipe_modules/flutter_bcid/api.py
@@ -47,36 +47,3 @@
     if self.is_official_build():
       sha256 = self.m.file.file_hash(local_artifact_path)
       self.m.bcid_reporter.report_gcs(sha256, remote_artifact_path)
-
-  def download_and_verify_provenance(
-      self, filename, bucket, gcs_path_without_bucket
-  ):
-    """Downloads and verifies provenance for a specified artifact.
-
-    This method downloads an artifact and associated provenance from GCS,
-    verifies it. If verification fails, an error is raised.
-
-    parameters:
-      filename: (str) the name of the file, eg: "flutter_artifact.zip"
-      bucket: (str) the GCS bucket, eg: "flutter_infra_release"
-      gcs_path_without_bucket: (str) the GCS path, excluding gs://{bucket}/
-        eg: "flutter/004d0bdf6721bc65cdb9a558908b2de4cfac97c5/sky_engine.zip"
-    """
-    verify_temp_path = self.m.path.mkdtemp("verify")
-    download_path = download_path = verify_temp_path.join(filename)
-    bcid_response = self.m.dart.download_and_verify(
-        filename, bucket, gcs_path_without_bucket, download_path,
-        'misc_software://flutter/engine'
-    )
-
-    artifact_vsa = bcid_response['verificationSummary']
-    vsa_local_path = f'{download_path}.vsa.intoto.jsonl'
-    self.m.file.write_text(
-        f'write {filename}.vsa.intoto.jsonl', vsa_local_path, artifact_vsa
-    )
-    self.m.gsutil.upload(
-        vsa_local_path,
-        bucket,
-        gcs_path_without_bucket,
-        name='upload "%s"' % gcs_path_without_bucket
-    )
diff --git a/recipe_modules/flutter_bcid/examples/full.expected/basic.json b/recipe_modules/flutter_bcid/examples/full.expected/basic.json
index 321de6d..42423f8 100644
--- a/recipe_modules/flutter_bcid/examples/full.expected/basic.json
+++ b/recipe_modules/flutter_bcid/examples/full.expected/basic.json
@@ -112,336 +112,6 @@
     "name": "snoop: report_gcs"
   },
   {
-    "cmd": [
-      "python3",
-      "-u",
-      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
-      "--",
-      "RECIPE_REPO[depot_tools]/gsutil.py",
-      "----",
-      "cp",
-      "gs://flutter_infra/release_artifacts/artifacts.zip",
-      "[CLEANUP]/verify_tmp_1/artifact.zip"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "gsutil download artifact.zip"
-  },
-  {
-    "cmd": [
-      "python3",
-      "-u",
-      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
-      "--",
-      "RECIPE_REPO[depot_tools]/gsutil.py",
-      "----",
-      "cp",
-      "gs://flutter_infra/release_artifacts/artifacts.zip.intoto.jsonl",
-      "[CLEANUP]/verify_tmp_1/artifact.zip.intoto.jsonl"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "gsutil download artifact.zip provenance"
-  },
-  {
-    "cmd": [
-      "luci-auth",
-      "token",
-      "-scopes",
-      "https://www.googleapis.com/auth/bcid_verify https://www.googleapis.com/auth/cloud-platform",
-      "-lifetime",
-      "3m"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "get access token for default account"
-  },
-  {
-    "cmd": [
-      "vpython3",
-      "-u",
-      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
-      "--json-output",
-      "/path/to/tmp/json",
-      "file_hash",
-      "[CLEANUP]/verify_tmp_1/artifact.zip"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "Compute file hash (2)",
-    "~followup_annotations": [
-      "@@@STEP_TEXT@Hash calculated: 3038cc85aa9c41479c21791a47b1af8f38a422a73f61553b320b1411018a4c90@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "vpython3",
-      "-u",
-      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
-      "--json-output",
-      "/path/to/tmp/json",
-      "copy",
-      "[CLEANUP]/verify_tmp_1/artifact.zip.intoto.jsonl",
-      "/path/to/tmp/"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "read artifact.zip provenance",
-    "~followup_annotations": [
-      "@@@STEP_LOG_END@artifact.zip.intoto.jsonl@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "vpython3",
-      "-u",
-      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
-      "--json-output",
-      "/path/to/tmp/json",
-      "copy",
-      "Authorization: Bearer extra.secret.token.should.not.be.logged\n",
-      "[CLEANUP]/authorization"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "write authorization"
-  },
-  {
-    "cmd": [
-      "vpython3",
-      "-u",
-      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
-      "--json-output",
-      "/path/to/tmp/json",
-      "copy",
-      "{\"resourceToVerify\": \"misc_software://flutter/engine\", \"artifactInfo\": {\"digests\": {\"sha256\": \"3038cc85aa9c41479c21791a47b1af8f38a422a73f61553b320b1411018a4c90\"}, \"attestations\": [\"\"]}}",
-      "[CLEANUP]/request"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "write request",
-    "~followup_annotations": [
-      "@@@STEP_LOG_LINE@request@{\"resourceToVerify\": \"misc_software://flutter/engine\", \"artifactInfo\": {\"digests\": {\"sha256\": \"3038cc85aa9c41479c21791a47b1af8f38a422a73f61553b320b1411018a4c90\"}, \"attestations\": [\"\"]}}@@@",
-      "@@@STEP_LOG_END@request@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "curl",
-      "-H",
-      "@[CLEANUP]/authorization",
-      "-H",
-      "Content-Type: application/json",
-      "-d",
-      "@[CLEANUP]/request",
-      "https://bcidsoftwareverifier-pa.googleapis.com/v1/software-artifact-verification-requests"
-    ],
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "verify artifact.zip provenance",
-    "~followup_annotations": [
-      "@@@STEP_LOG_LINE@raw_io.output_text@{\"allowed\": true, \"verificationSummary\": \"This artifact is definitely legitimate!\"}@@@",
-      "@@@STEP_LOG_END@raw_io.output_text@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "vpython3",
-      "-u",
-      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
-      "--json-output",
-      "/path/to/tmp/json",
-      "remove",
-      "[CLEANUP]/authorization"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "delete authorization"
-  },
-  {
-    "cmd": [
-      "vpython3",
-      "-u",
-      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
-      "--json-output",
-      "/path/to/tmp/json",
-      "remove",
-      "[CLEANUP]/request"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "delete request"
-  },
-  {
-    "cmd": [
-      "vpython3",
-      "-u",
-      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
-      "--json-output",
-      "/path/to/tmp/json",
-      "copy",
-      "This artifact is definitely legitimate!",
-      "[CLEANUP]/verify_tmp_1/artifact.zip.vsa.intoto.jsonl"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "write artifact.zip.vsa.intoto.jsonl",
-    "~followup_annotations": [
-      "@@@STEP_LOG_LINE@artifact.zip.vsa.intoto.jsonl@This artifact is definitely legitimate!@@@",
-      "@@@STEP_LOG_END@artifact.zip.vsa.intoto.jsonl@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "python3",
-      "-u",
-      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
-      "--",
-      "RECIPE_REPO[depot_tools]/gsutil.py",
-      "----",
-      "cp",
-      "[CLEANUP]/verify_tmp_1/artifact.zip.vsa.intoto.jsonl",
-      "gs://flutter_infra/release_artifacts/artifacts.zip"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "gsutil upload \"release_artifacts/artifacts.zip\"",
-    "~followup_annotations": [
-      "@@@STEP_LINK@gsutil.upload@https://storage.cloud.google.com/flutter_infra/release_artifacts/artifacts.zip@@@"
-    ]
-  },
-  {
     "name": "$result"
   }
 ]
\ No newline at end of file
diff --git a/recipe_modules/flutter_bcid/examples/full.expected/prod_build.json b/recipe_modules/flutter_bcid/examples/full.expected/prod_build.json
index 321de6d..42423f8 100644
--- a/recipe_modules/flutter_bcid/examples/full.expected/prod_build.json
+++ b/recipe_modules/flutter_bcid/examples/full.expected/prod_build.json
@@ -112,336 +112,6 @@
     "name": "snoop: report_gcs"
   },
   {
-    "cmd": [
-      "python3",
-      "-u",
-      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
-      "--",
-      "RECIPE_REPO[depot_tools]/gsutil.py",
-      "----",
-      "cp",
-      "gs://flutter_infra/release_artifacts/artifacts.zip",
-      "[CLEANUP]/verify_tmp_1/artifact.zip"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "gsutil download artifact.zip"
-  },
-  {
-    "cmd": [
-      "python3",
-      "-u",
-      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
-      "--",
-      "RECIPE_REPO[depot_tools]/gsutil.py",
-      "----",
-      "cp",
-      "gs://flutter_infra/release_artifacts/artifacts.zip.intoto.jsonl",
-      "[CLEANUP]/verify_tmp_1/artifact.zip.intoto.jsonl"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "gsutil download artifact.zip provenance"
-  },
-  {
-    "cmd": [
-      "luci-auth",
-      "token",
-      "-scopes",
-      "https://www.googleapis.com/auth/bcid_verify https://www.googleapis.com/auth/cloud-platform",
-      "-lifetime",
-      "3m"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "get access token for default account"
-  },
-  {
-    "cmd": [
-      "vpython3",
-      "-u",
-      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
-      "--json-output",
-      "/path/to/tmp/json",
-      "file_hash",
-      "[CLEANUP]/verify_tmp_1/artifact.zip"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "Compute file hash (2)",
-    "~followup_annotations": [
-      "@@@STEP_TEXT@Hash calculated: 3038cc85aa9c41479c21791a47b1af8f38a422a73f61553b320b1411018a4c90@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "vpython3",
-      "-u",
-      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
-      "--json-output",
-      "/path/to/tmp/json",
-      "copy",
-      "[CLEANUP]/verify_tmp_1/artifact.zip.intoto.jsonl",
-      "/path/to/tmp/"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "read artifact.zip provenance",
-    "~followup_annotations": [
-      "@@@STEP_LOG_END@artifact.zip.intoto.jsonl@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "vpython3",
-      "-u",
-      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
-      "--json-output",
-      "/path/to/tmp/json",
-      "copy",
-      "Authorization: Bearer extra.secret.token.should.not.be.logged\n",
-      "[CLEANUP]/authorization"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "write authorization"
-  },
-  {
-    "cmd": [
-      "vpython3",
-      "-u",
-      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
-      "--json-output",
-      "/path/to/tmp/json",
-      "copy",
-      "{\"resourceToVerify\": \"misc_software://flutter/engine\", \"artifactInfo\": {\"digests\": {\"sha256\": \"3038cc85aa9c41479c21791a47b1af8f38a422a73f61553b320b1411018a4c90\"}, \"attestations\": [\"\"]}}",
-      "[CLEANUP]/request"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "write request",
-    "~followup_annotations": [
-      "@@@STEP_LOG_LINE@request@{\"resourceToVerify\": \"misc_software://flutter/engine\", \"artifactInfo\": {\"digests\": {\"sha256\": \"3038cc85aa9c41479c21791a47b1af8f38a422a73f61553b320b1411018a4c90\"}, \"attestations\": [\"\"]}}@@@",
-      "@@@STEP_LOG_END@request@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "curl",
-      "-H",
-      "@[CLEANUP]/authorization",
-      "-H",
-      "Content-Type: application/json",
-      "-d",
-      "@[CLEANUP]/request",
-      "https://bcidsoftwareverifier-pa.googleapis.com/v1/software-artifact-verification-requests"
-    ],
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "verify artifact.zip provenance",
-    "~followup_annotations": [
-      "@@@STEP_LOG_LINE@raw_io.output_text@{\"allowed\": true, \"verificationSummary\": \"This artifact is definitely legitimate!\"}@@@",
-      "@@@STEP_LOG_END@raw_io.output_text@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "vpython3",
-      "-u",
-      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
-      "--json-output",
-      "/path/to/tmp/json",
-      "remove",
-      "[CLEANUP]/authorization"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "delete authorization"
-  },
-  {
-    "cmd": [
-      "vpython3",
-      "-u",
-      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
-      "--json-output",
-      "/path/to/tmp/json",
-      "remove",
-      "[CLEANUP]/request"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "delete request"
-  },
-  {
-    "cmd": [
-      "vpython3",
-      "-u",
-      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
-      "--json-output",
-      "/path/to/tmp/json",
-      "copy",
-      "This artifact is definitely legitimate!",
-      "[CLEANUP]/verify_tmp_1/artifact.zip.vsa.intoto.jsonl"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "write artifact.zip.vsa.intoto.jsonl",
-    "~followup_annotations": [
-      "@@@STEP_LOG_LINE@artifact.zip.vsa.intoto.jsonl@This artifact is definitely legitimate!@@@",
-      "@@@STEP_LOG_END@artifact.zip.vsa.intoto.jsonl@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "python3",
-      "-u",
-      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
-      "--",
-      "RECIPE_REPO[depot_tools]/gsutil.py",
-      "----",
-      "cp",
-      "[CLEANUP]/verify_tmp_1/artifact.zip.vsa.intoto.jsonl",
-      "gs://flutter_infra/release_artifacts/artifacts.zip"
-    ],
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "gsutil upload \"release_artifacts/artifacts.zip\"",
-    "~followup_annotations": [
-      "@@@STEP_LINK@gsutil.upload@https://storage.cloud.google.com/flutter_infra/release_artifacts/artifacts.zip@@@"
-    ]
-  },
-  {
     "name": "$result"
   }
 ]
\ No newline at end of file
diff --git a/recipe_modules/flutter_bcid/examples/full.py b/recipe_modules/flutter_bcid/examples/full.py
index 428cfee..d423d09 100644
--- a/recipe_modules/flutter_bcid/examples/full.py
+++ b/recipe_modules/flutter_bcid/examples/full.py
@@ -6,7 +6,6 @@
     'flutter/flutter_bcid',
     'recipe_engine/buildbucket',
     'recipe_engine/path',
-    'recipe_engine/raw_io',
 ]
 
 
@@ -17,14 +16,9 @@
   )
   api.flutter_bcid.is_official_build()
   api.flutter_bcid.is_prod_build()
-  api.flutter_bcid.download_and_verify_provenance(
-      "artifact.zip", "flutter_infra", "release_artifacts/artifacts.zip"
-  )
 
 
 def GenTests(api):
-  fake_bcid_response_success = '{"allowed": true, "verificationSummary": "This artifact is definitely legitimate!"}'
-  artifacts_location = 'artifact.zip'
   yield api.test(
       'basic',
       api.buildbucket.ci_build(
@@ -33,10 +27,6 @@
           git_repo='https://dart.googlesource.com/monorepo',
           git_ref='refs/heads/main'
       ),
-      api.step_data(
-          'verify %s provenance' % artifacts_location,
-          stdout=api.raw_io.output_text(fake_bcid_response_success)
-      ),
   )
 
   yield api.test(
@@ -47,8 +37,4 @@
           git_repo='https://dart.googlesource.com/monorepo',
           git_ref='refs/heads/main'
       ),
-      api.step_data(
-          'verify %s provenance' % artifacts_location,
-          stdout=api.raw_io.output_text(fake_bcid_response_success)
-      ),
   )
diff --git a/recipes/engine_v2/builder.expected/dart-internal-flutter-success.json b/recipes/engine_v2/builder.expected/dart-internal-flutter-success.json
index 68ff16c..c2c9972 100644
--- a/recipes/engine_v2/builder.expected/dart-internal-flutter-success.json
+++ b/recipes/engine_v2/builder.expected/dart-internal-flutter-success.json
@@ -2859,7 +2859,7 @@
     "name": "Verify provenance.verify artifacts.zip provenance",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_LOG_LINE@raw_io.output_text@{\"allowed\": true, \"verificationSummary\": \"This artifact is definitely legitimate!\"}@@@",
+      "@@@STEP_LOG_LINE@raw_io.output_text@{\"allowed\": true}@@@",
       "@@@STEP_LOG_END@raw_io.output_text@@@"
     ]
   },
@@ -2979,126 +2979,6 @@
   },
   {
     "cmd": [
-      "vpython3",
-      "-u",
-      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
-      "--json-output",
-      "/path/to/tmp/json",
-      "copy",
-      "This artifact is definitely legitimate!",
-      "[CLEANUP]/verify_tmp_1/artifacts.zip.vsa.intoto.jsonl"
-    ],
-    "cwd": "[CACHE]/builder/src/flutter",
-    "env": {
-      "ANDROID_HOME": "[CACHE]/builder/src/third_party/android_tools/sdk",
-      "ANDROID_SDK_HOME": "[CLEANUP]/tmp_tmp_1",
-      "ANDROID_USER_HOME": "[CLEANUP]/tmp_tmp_1/.android",
-      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
-      "ENGINE_CHECKOUT_PATH": "[CACHE]/builder",
-      "ENGINE_PATH": "[CACHE]/builder",
-      "GIT_BRANCH": "",
-      "LUCI_BRANCH": "",
-      "LUCI_CI": "True",
-      "LUCI_PR": "",
-      "LUCI_WORKDIR": "[START_DIR]",
-      "OS": "linux",
-      "REVISION": "2d72510e447ab60a9728aeea2362d8be2cbd7789"
-    },
-    "env_prefixes": {
-      "PATH": [
-        "[CACHE]/builder/src/third_party/dart/tools/sdks/dart-sdk/bin"
-      ]
-    },
-    "env_suffixes": {
-      "DEPOT_TOOLS_UPDATE": [
-        "0"
-      ],
-      "PATH": [
-        "RECIPE_REPO[depot_tools]"
-      ]
-    },
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "Verify provenance.write artifacts.zip.vsa.intoto.jsonl",
-    "~followup_annotations": [
-      "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_LOG_LINE@artifacts.zip.vsa.intoto.jsonl@This artifact is definitely legitimate!@@@",
-      "@@@STEP_LOG_END@artifacts.zip.vsa.intoto.jsonl@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "python3",
-      "-u",
-      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
-      "--",
-      "RECIPE_REPO[depot_tools]/gsutil.py",
-      "----",
-      "cp",
-      "[CLEANUP]/verify_tmp_1/artifacts.zip.vsa.intoto.jsonl",
-      "gs://flutter_infra_release/flutter/12345abcde12345abcde12345abcde12345abcde/android-x86-jit-release/artifacts.zip"
-    ],
-    "cwd": "[CACHE]/builder/src/flutter",
-    "env": {
-      "ANDROID_HOME": "[CACHE]/builder/src/third_party/android_tools/sdk",
-      "ANDROID_SDK_HOME": "[CLEANUP]/tmp_tmp_1",
-      "ANDROID_USER_HOME": "[CLEANUP]/tmp_tmp_1/.android",
-      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
-      "ENGINE_CHECKOUT_PATH": "[CACHE]/builder",
-      "ENGINE_PATH": "[CACHE]/builder",
-      "GIT_BRANCH": "",
-      "LUCI_BRANCH": "",
-      "LUCI_CI": "True",
-      "LUCI_PR": "",
-      "LUCI_WORKDIR": "[START_DIR]",
-      "OS": "linux",
-      "REVISION": "2d72510e447ab60a9728aeea2362d8be2cbd7789"
-    },
-    "env_prefixes": {
-      "PATH": [
-        "[CACHE]/builder/src/third_party/dart/tools/sdks/dart-sdk/bin"
-      ]
-    },
-    "env_suffixes": {
-      "DEPOT_TOOLS_UPDATE": [
-        "0"
-      ],
-      "PATH": [
-        "RECIPE_REPO[depot_tools]"
-      ]
-    },
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "Verify provenance.gsutil upload \"flutter/12345abcde12345abcde12345abcde12345abcde/android-x86-jit-release/artifacts.zip\"",
-    "~followup_annotations": [
-      "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_LINK@gsutil.upload@https://storage.cloud.google.com/flutter_infra_release/flutter/12345abcde12345abcde12345abcde12345abcde/android-x86-jit-release/artifacts.zip@@@"
-    ]
-  },
-  {
-    "cmd": [
       "python3",
       "-u",
       "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
@@ -3561,7 +3441,7 @@
     "name": "Verify provenance.verify x86_debug-1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584.jar provenance",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_LOG_LINE@raw_io.output_text@{\"allowed\": true, \"verificationSummary\": \"This artifact is definitely legitimate!\"}@@@",
+      "@@@STEP_LOG_LINE@raw_io.output_text@{\"allowed\": true}@@@",
       "@@@STEP_LOG_END@raw_io.output_text@@@"
     ]
   },
@@ -3681,126 +3561,6 @@
   },
   {
     "cmd": [
-      "vpython3",
-      "-u",
-      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
-      "--json-output",
-      "/path/to/tmp/json",
-      "copy",
-      "This artifact is definitely legitimate!",
-      "[CLEANUP]/verify_tmp_2/x86_debug-1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584.jar.vsa.intoto.jsonl"
-    ],
-    "cwd": "[CACHE]/builder/src/flutter",
-    "env": {
-      "ANDROID_HOME": "[CACHE]/builder/src/third_party/android_tools/sdk",
-      "ANDROID_SDK_HOME": "[CLEANUP]/tmp_tmp_1",
-      "ANDROID_USER_HOME": "[CLEANUP]/tmp_tmp_1/.android",
-      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
-      "ENGINE_CHECKOUT_PATH": "[CACHE]/builder",
-      "ENGINE_PATH": "[CACHE]/builder",
-      "GIT_BRANCH": "",
-      "LUCI_BRANCH": "",
-      "LUCI_CI": "True",
-      "LUCI_PR": "",
-      "LUCI_WORKDIR": "[START_DIR]",
-      "OS": "linux",
-      "REVISION": "2d72510e447ab60a9728aeea2362d8be2cbd7789"
-    },
-    "env_prefixes": {
-      "PATH": [
-        "[CACHE]/builder/src/third_party/dart/tools/sdks/dart-sdk/bin"
-      ]
-    },
-    "env_suffixes": {
-      "DEPOT_TOOLS_UPDATE": [
-        "0"
-      ],
-      "PATH": [
-        "RECIPE_REPO[depot_tools]"
-      ]
-    },
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "Verify provenance.write x86_debug-1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584.jar.vsa.intoto.jsonl",
-    "~followup_annotations": [
-      "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_LOG_LINE@x86_debug-1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584.jar.vsa.intoto.jsonl@This artifact is definitely legitimate!@@@",
-      "@@@STEP_LOG_END@x86_debug-1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584.jar.vsa.intoto.jsonl@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "python3",
-      "-u",
-      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
-      "--",
-      "RECIPE_REPO[depot_tools]/gsutil.py",
-      "----",
-      "cp",
-      "[CLEANUP]/verify_tmp_2/x86_debug-1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584.jar.vsa.intoto.jsonl",
-      "gs://download.flutter.io/io/flutter/x86_debug/1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584/x86_debug-1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584.jar"
-    ],
-    "cwd": "[CACHE]/builder/src/flutter",
-    "env": {
-      "ANDROID_HOME": "[CACHE]/builder/src/third_party/android_tools/sdk",
-      "ANDROID_SDK_HOME": "[CLEANUP]/tmp_tmp_1",
-      "ANDROID_USER_HOME": "[CLEANUP]/tmp_tmp_1/.android",
-      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
-      "ENGINE_CHECKOUT_PATH": "[CACHE]/builder",
-      "ENGINE_PATH": "[CACHE]/builder",
-      "GIT_BRANCH": "",
-      "LUCI_BRANCH": "",
-      "LUCI_CI": "True",
-      "LUCI_PR": "",
-      "LUCI_WORKDIR": "[START_DIR]",
-      "OS": "linux",
-      "REVISION": "2d72510e447ab60a9728aeea2362d8be2cbd7789"
-    },
-    "env_prefixes": {
-      "PATH": [
-        "[CACHE]/builder/src/third_party/dart/tools/sdks/dart-sdk/bin"
-      ]
-    },
-    "env_suffixes": {
-      "DEPOT_TOOLS_UPDATE": [
-        "0"
-      ],
-      "PATH": [
-        "RECIPE_REPO[depot_tools]"
-      ]
-    },
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "Verify provenance.gsutil upload \"io/flutter/x86_debug/1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584/x86_debug-1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584.jar\"",
-    "~followup_annotations": [
-      "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_LINK@gsutil.upload@https://storage.cloud.google.com/download.flutter.io/io/flutter/x86_debug/1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584/x86_debug-1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584.jar@@@"
-    ]
-  },
-  {
-    "cmd": [
       "python3",
       "-u",
       "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
@@ -4263,7 +4023,7 @@
     "name": "Verify provenance.verify x86_debug-1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584.pom provenance",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_LOG_LINE@raw_io.output_text@{\"allowed\": true, \"verificationSummary\": \"This artifact is definitely legitimate!\"}@@@",
+      "@@@STEP_LOG_LINE@raw_io.output_text@{\"allowed\": true}@@@",
       "@@@STEP_LOG_END@raw_io.output_text@@@"
     ]
   },
@@ -4388,126 +4148,6 @@
       "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
       "--json-output",
       "/path/to/tmp/json",
-      "copy",
-      "This artifact is definitely legitimate!",
-      "[CLEANUP]/verify_tmp_3/x86_debug-1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584.pom.vsa.intoto.jsonl"
-    ],
-    "cwd": "[CACHE]/builder/src/flutter",
-    "env": {
-      "ANDROID_HOME": "[CACHE]/builder/src/third_party/android_tools/sdk",
-      "ANDROID_SDK_HOME": "[CLEANUP]/tmp_tmp_1",
-      "ANDROID_USER_HOME": "[CLEANUP]/tmp_tmp_1/.android",
-      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
-      "ENGINE_CHECKOUT_PATH": "[CACHE]/builder",
-      "ENGINE_PATH": "[CACHE]/builder",
-      "GIT_BRANCH": "",
-      "LUCI_BRANCH": "",
-      "LUCI_CI": "True",
-      "LUCI_PR": "",
-      "LUCI_WORKDIR": "[START_DIR]",
-      "OS": "linux",
-      "REVISION": "2d72510e447ab60a9728aeea2362d8be2cbd7789"
-    },
-    "env_prefixes": {
-      "PATH": [
-        "[CACHE]/builder/src/third_party/dart/tools/sdks/dart-sdk/bin"
-      ]
-    },
-    "env_suffixes": {
-      "DEPOT_TOOLS_UPDATE": [
-        "0"
-      ],
-      "PATH": [
-        "RECIPE_REPO[depot_tools]"
-      ]
-    },
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "Verify provenance.write x86_debug-1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584.pom.vsa.intoto.jsonl",
-    "~followup_annotations": [
-      "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_LOG_LINE@x86_debug-1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584.pom.vsa.intoto.jsonl@This artifact is definitely legitimate!@@@",
-      "@@@STEP_LOG_END@x86_debug-1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584.pom.vsa.intoto.jsonl@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "python3",
-      "-u",
-      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
-      "--",
-      "RECIPE_REPO[depot_tools]/gsutil.py",
-      "----",
-      "cp",
-      "[CLEANUP]/verify_tmp_3/x86_debug-1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584.pom.vsa.intoto.jsonl",
-      "gs://download.flutter.io/io/flutter/x86_debug/1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584/x86_debug-1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584.pom"
-    ],
-    "cwd": "[CACHE]/builder/src/flutter",
-    "env": {
-      "ANDROID_HOME": "[CACHE]/builder/src/third_party/android_tools/sdk",
-      "ANDROID_SDK_HOME": "[CLEANUP]/tmp_tmp_1",
-      "ANDROID_USER_HOME": "[CLEANUP]/tmp_tmp_1/.android",
-      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
-      "ENGINE_CHECKOUT_PATH": "[CACHE]/builder",
-      "ENGINE_PATH": "[CACHE]/builder",
-      "GIT_BRANCH": "",
-      "LUCI_BRANCH": "",
-      "LUCI_CI": "True",
-      "LUCI_PR": "",
-      "LUCI_WORKDIR": "[START_DIR]",
-      "OS": "linux",
-      "REVISION": "2d72510e447ab60a9728aeea2362d8be2cbd7789"
-    },
-    "env_prefixes": {
-      "PATH": [
-        "[CACHE]/builder/src/third_party/dart/tools/sdks/dart-sdk/bin"
-      ]
-    },
-    "env_suffixes": {
-      "DEPOT_TOOLS_UPDATE": [
-        "0"
-      ],
-      "PATH": [
-        "RECIPE_REPO[depot_tools]"
-      ]
-    },
-    "infra_step": true,
-    "luci_context": {
-      "realm": {
-        "name": "dart-internal:flutter"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "Verify provenance.gsutil upload \"io/flutter/x86_debug/1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584/x86_debug-1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584.pom\"",
-    "~followup_annotations": [
-      "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_LINK@gsutil.upload@https://storage.cloud.google.com/download.flutter.io/io/flutter/x86_debug/1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584/x86_debug-1.0.0-0005149dca9b248663adcde4bdd7c6c915a76584.pom@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "vpython3",
-      "-u",
-      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
-      "--json-output",
-      "/path/to/tmp/json",
       "copytree",
       "[CACHE]/builder/src/out",
       "[CLEANUP]/out-cas-directory_tmp_1"
diff --git a/recipes/engine_v2/builder.py b/recipes/engine_v2/builder.py
index 6965dc6..877ad52 100644
--- a/recipes/engine_v2/builder.py
+++ b/recipes/engine_v2/builder.py
@@ -33,7 +33,9 @@
 from PB.go.chromium.org.luci.buildbucket.proto import build as build_pb2
 
 DEPS = [
+    'dart/dart',
     'depot_tools/depot_tools',
+    'depot_tools/gsutil',
     'flutter/archives',
     'flutter/build_util',
     'flutter/flutter_bcid',
@@ -224,6 +226,7 @@
               '(Non-blocking) Provenance verification failed - check step above',
               []
           )
+          continue
   # Archive full build. This is inefficient but necessary for global generators.
   if build.get('cas_archive', True):
     full_build_hash = api.shard_util_v2.archive_full_build(
@@ -256,14 +259,17 @@
   paths = api.archives.engine_v2_gcs_paths(checkout, archive_config)
 
   for path in paths:
+    verify_temp_path = api.path.mkdtemp("verify")
     gcs_path = path.remote
     gcs_path_without_prefix = str.lstrip(gcs_path, 'gs://')
     file = api.path.basename(gcs_path)
     bucket = gcs_path_without_prefix.split('/', maxsplit=1)[0]
     gcs_path_without_bucket = '/'.join(gcs_path_without_prefix.split('/')[1:])
+    download_path = verify_temp_path.join(file)
 
-    api.flutter_bcid.download_and_verify_provenance(
-        file, bucket, gcs_path_without_bucket
+    api.dart.download_and_verify(
+        file, bucket, gcs_path_without_bucket, download_path,
+        'misc_software://flutter/engine'
     )
 
 
@@ -387,8 +393,6 @@
       api.monorepo.try_build(),
   )
 
-  fake_bcid_response_success = '{"allowed": true, "verificationSummary": "This artifact is definitely legitimate!"}'
-  fake_bcid_response_failure = '{"rejectionMessage": "failed to validate!"}'
   build_custom = dict(build)
   build_custom["gclient_variables"] = {"example_custom_var": True}
   build_custom["tests"] = []
@@ -406,15 +410,15 @@
       ),
       api.step_data(
           'Verify provenance.verify %s provenance' % artifacts_location,
-          stdout=api.raw_io.output_text(fake_bcid_response_success)
+          stdout=api.raw_io.output_text('{"allowed": true}')
       ),
       api.step_data(
           'Verify provenance.verify %s provenance' % jar_location,
-          stdout=api.raw_io.output_text(fake_bcid_response_success)
+          stdout=api.raw_io.output_text('{"allowed": true}')
       ),
       api.step_data(
           'Verify provenance.verify %s provenance' % pom_location,
-          stdout=api.raw_io.output_text(fake_bcid_response_success)
+          stdout=api.raw_io.output_text('{"allowed": true}')
       ),
   )
   yield api.test(
@@ -428,6 +432,7 @@
       ),
       api.step_data(
           'Verify provenance.verify %s provenance' % artifacts_location,
-          stdout=api.raw_io.output_text(fake_bcid_response_failure)
+          stdout=api.raw_io
+          .output_text('{"rejectionMessage": "failed to validate!"}')
       ),
   )