Attestations for
  ghcr.io/boks-sh/openssh-keygen@sha256:526ef1694eb2b81e3a26dadbdb1d146697deec8e856d40884f9a7535f16e605d

Verify them yourself:
  cosign verify-attestation --key cosign.pub \
      --type <cyclonedx|slsaprovenance> ghcr.io/boks-sh/openssh-keygen@sha256:526ef1694eb2b81e3a26dadbdb1d146697deec8e856d40884f9a7535f16e605d

=== 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)