Attestations for
  ghcr.io/boks-sh/sed@sha256:91d42a03e257038904184f0f1ff4ebb976f3679a4829a7f0c60fd1ea2f78e995

Verify them yourself:
  cosign verify-attestation --key cosign.pub \
      --type <cyclonedx|slsaprovenance> ghcr.io/boks-sh/sed@sha256:91d42a03e257038904184f0f1ff4ebb976f3679a4829a7f0c60fd1ea2f78e995

=== 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)