Attestations for
  ghcr.io/boks-sh/cosign@sha256:5856cfbb941628a90acec1a9dac1c08ab3d5c51ff03805ffadf12c716d156c86

Verify them yourself:
  cosign verify-attestation --key cosign.pub \
      --type <cyclonedx|slsaprovenance> ghcr.io/boks-sh/cosign@sha256:5856cfbb941628a90acec1a9dac1c08ab3d5c51ff03805ffadf12c716d156c86

=== 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)