Attestations for
  ghcr.io/kapsl-sh/m4@sha256:b56a0004056f217183a7f6b9011b35a3ef7f7823dbc3d4ec4804e7e52a8d942a

Verify them yourself:
  cosign verify-attestation --key cosign.pub \
      --type <cyclonedx|slsaprovenance> ghcr.io/kapsl-sh/m4@sha256:b56a0004056f217183a7f6b9011b35a3ef7f7823dbc3d4ec4804e7e52a8d942a

=== cyclonedx ===================================================
  subject   ghcr.io/kapsl-sh/m4
  digest    sha256:b56a0004056f217183a7f6b9011b35a3ef7f7823dbc3d4ec4804e7e52a8d942a
  states    1 component(s) are inside this image
      m4                     1.4.21-1                 pkg:deb/ubuntu/m4@1.4.21-1?distro=ubuntu-26.04

=== slsaprovenance ==============================================
  subject   ghcr.io/kapsl-sh/m4
  digest    sha256:b56a0004056f217183a7f6b9011b35a3ef7f7823dbc3d4ec4804e7e52a8d942a
  build     https://index.kapsl.sh/buildtype/v1
  builder   https://index.kapsl.sh
  from      2 resolved input(s)
      base-image         ghcr.io/kapsl-sh/kapsl-base-static:latest
      apt-package        pkg:deb/ubuntu/m4@1.4.21-1?arch=arm64
  sbom      sbom.json sha256:52e3d07711478772b7aa89c5b16c9a32...