Attestations for
  ghcr.io/boks-sh/sed@sha256:c288ac1184cfc5493f38bb21dbbfacc94b127fd96206f7ce1143a9f717e7953c

Verify them yourself:
  cosign verify-attestation --key cosign.pub \
      --type <cyclonedx|slsaprovenance> ghcr.io/boks-sh/sed@sha256:c288ac1184cfc5493f38bb21dbbfacc94b127fd96206f7ce1143a9f717e7953c

=== 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)