Attestations for
  ghcr.io/boks-sh/openssh-keyscan@sha256:23132a612540e0712b24114be23745d03158d2640a55edbf91422b2606e87c2a

Verify them yourself:
  cosign verify-attestation --key cosign.pub \
      --type <cyclonedx|slsaprovenance> ghcr.io/boks-sh/openssh-keyscan@sha256:23132a612540e0712b24114be23745d03158d2640a55edbf91422b2606e87c2a

=== 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)