A downloaded binary can arrive with a signed statement describing where and how it was built. That statement adds evidence about the artifact's origin. Its value depends on checking both the signature and whether the stated origin matches the organization's release policy.
Provenance answers a different question from vulnerability testing. A build can come from the expected repository and still contain a software defect or an unsafe change.
Bind the statement to the actual artifact
GitHub's artifact-attestation documentation describes signed provenance associated with build outputs. Verification connects an artifact digest to information about its build context. GitHub's attestation guidance explains the intended use.
An illustrative release service downloads an application archive and its attestation. Checking an attestation for a different archive would not establish the origin of the file about to be deployed. The digest relationship makes that distinction explicit, even when filenames are identical.
A trusted signature needs an acceptance policy
The verifier can check whether the signer, source repository, build workflow, and other relevant claims match approved values. A valid statement from an unrelated project remains unrelated. The organization has to define which build identities and source contexts are authorized for its application.
This decision can be expressed in the deployment process rather than left to an operator reading a badge. Record what happens if the attestation is missing, invalid, or valid but outside the allowed policy. Silent fallback to an unverified artifact changes the assurance provided by the control.
Keep provenance and review separate
An attestation does not establish that reviewers approved the code or that tests exercised every relevant behavior unless those claims are specifically made and verified through the chosen system. Even then, completion of a review or test does not prove absence of defects.
For business acceptance, distinguish three records: the artifact that will run, evidence of its approved build path, and evidence of testing or review. Linking them by revision and digest allows a release reviewer to see whether they describe the same deliverable.
Test rejection paths before relying on them
Use a harmless test artifact to verify normal acceptance. Then change the file after attestation, supply evidence from another repository, and omit the evidence entirely. Each case tests a different rule. Record the deployment decision and whether any bypass path was used.
The assessment can identify where verification occurs and whether the same rule applies to routine releases, rollback, and emergency deployment. A normal release that enforces provenance while an unrestricted alternate path accepts any archive provides incomplete coverage. The final report can describe that coverage precisely without equating a signature with a general security guarantee.
Sources
SLSA: Verifying Artifacts. The release service is an illustrative verifier design.
