Attestations for
  ghcr.io/boks-sh/mypy@sha256:f908ac6e7862d6a80ad17b3780cc4b47a9ef2f48ba36212d0a821ba07ee6f689

Verify them yourself:
  cosign verify-attestation --key cosign.pub \
      --type <cyclonedx|slsaprovenance> ghcr.io/boks-sh/mypy@sha256:f908ac6e7862d6a80ad17b3780cc4b47a9ef2f48ba36212d0a821ba07ee6f689

=== cyclonedx ===================================================
  (no attestation matches the document published now -- 1 older one(s) are attached)

=== slsaprovenance ==============================================
  (no attestation matches the document published now -- 1 older one(s) are attached)