The image is signed "keylessly" using Sigstore cosign. To verify its authenticity run
cosign verify \
--certificate-identity "https://github.com/nais/deployment-event-relays/.github/workflows/build.yml@refs/heads/master" \
--certificate-oidc-issuer "https://token.actions.githubusercontent.com" \
ghcr.io/nais/deployment-event-relays@sha256:<shasum>
The images are also attested with SBOMs in the CycloneDX format. You can verify these by running
cosign verify-attestation --type cyclonedx \
--certificate-identity "https://github.com/nais/deployment-event-relays/.github/workflows/build.yml@refs/heads/master" \
--certificate-oidc-issuer "https://token.actions.githubusercontent.com" \
ghcr.io/nais/deployment-event-relays@sha256:<shasum>