Attestations for
  ghcr.io/boks-sh/openssh-agent@sha256:4c15db81e9cefad2846fa92bce9032298561a470918a23e3fb07894bb0bbed8c

Verify them yourself:
  cosign verify-attestation --key cosign.pub \
      --type <cyclonedx|slsaprovenance> ghcr.io/boks-sh/openssh-agent@sha256:4c15db81e9cefad2846fa92bce9032298561a470918a23e3fb07894bb0bbed8c

=== 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)