Attestations for
  ghcr.io/boks-sh/gcc@sha256:790d85916823fd3c3067cba05c1d85d5556c953ed7679760150d2245d0fd6494

Verify them yourself:
  cosign verify-attestation --key cosign.pub \
      --type <cyclonedx|slsaprovenance> ghcr.io/boks-sh/gcc@sha256:790d85916823fd3c3067cba05c1d85d5556c953ed7679760150d2245d0fd6494

=== cyclonedx ===================================================
  (no attestation matches the document published now -- 0 older one(s) are attached)

=== slsaprovenance ==============================================
  (no attestation matches the document published now -- 0 older one(s) are attached)