Attestations for
  ghcr.io/boks-sh/grep@sha256:f2d1c193e4ffbac0f664ffe58126ff72e82a2830a547c04e20824e6204700d3d

Verify them yourself:
  cosign verify-attestation --key cosign.pub \
      --type <cyclonedx|slsaprovenance> ghcr.io/boks-sh/grep@sha256:f2d1c193e4ffbac0f664ffe58126ff72e82a2830a547c04e20824e6204700d3d

=== 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)