Attestations for
  ghcr.io/boks-sh/grep@sha256:1057b10727a2fad55adea7e3c38f1d6a751e1f5cd89ba652e034d5919c8dd061

Verify them yourself:
  cosign verify-attestation --key cosign.pub \
      --type <cyclonedx|slsaprovenance> ghcr.io/boks-sh/grep@sha256:1057b10727a2fad55adea7e3c38f1d6a751e1f5cd89ba652e034d5919c8dd061

=== 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)