Attestations for
  ghcr.io/boks-sh/gzip@sha256:8d87cb789ed74113387bef0846ed8943d3d381c7b7fdae148d54fca4108f47dd

Verify them yourself:
  cosign verify-attestation --key cosign.pub \
      --type <cyclonedx|slsaprovenance> ghcr.io/boks-sh/gzip@sha256:8d87cb789ed74113387bef0846ed8943d3d381c7b7fdae148d54fca4108f47dd

=== 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)