Attestations for
  ghcr.io/boks-sh/sed@sha256:db397b4373d0665f69a7397d37452902b36ba5c53117aae9e21cb7defd2a8d58

Verify them yourself:
  cosign verify-attestation --key cosign.pub \
      --type <cyclonedx|slsaprovenance> ghcr.io/boks-sh/sed@sha256:db397b4373d0665f69a7397d37452902b36ba5c53117aae9e21cb7defd2a8d58

=== 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)