Attestations for
  ghcr.io/boks-sh/npm@sha256:091308a5772af46e41bd0f4aea6cdc2922d6484afcb7a14cb27edf219f958d1e

Verify them yourself:
  cosign verify-attestation --key cosign.pub \
      --type <cyclonedx|slsaprovenance> ghcr.io/boks-sh/npm@sha256:091308a5772af46e41bd0f4aea6cdc2922d6484afcb7a14cb27edf219f958d1e

=== 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)