Attestations for
  ghcr.io/kapsl-sh/go-toolchain@sha256:99cb7f19bc211d37a2e95630e2c1c25538bd9bde9e8ab6d50f91635d4b69c59d

Verify them yourself:
  cosign verify-attestation --key cosign.pub \
      --type <cyclonedx|slsaprovenance> ghcr.io/kapsl-sh/go-toolchain@sha256:99cb7f19bc211d37a2e95630e2c1c25538bd9bde9e8ab6d50f91635d4b69c59d

=== cyclonedx ===================================================
  subject   ghcr.io/kapsl-sh/go-toolchain
  digest    sha256:99cb7f19bc211d37a2e95630e2c1c25538bd9bde9e8ab6d50f91635d4b69c59d
  states    2 component(s) are inside this image
      go                     1.27.0                   pkg:generic/go@1.27.0
      stdlib                 go1.27.0                 pkg:golang/stdlib@1.27.0

=== slsaprovenance ==============================================
  subject   ghcr.io/kapsl-sh/go-toolchain
  digest    sha256:99cb7f19bc211d37a2e95630e2c1c25538bd9bde9e8ab6d50f91635d4b69c59d
  build     https://index.kapsl.sh/buildtype/v1
  builder   https://index.kapsl.sh
  from      4 resolved input(s)
      release-asset-aarch64 https://go.dev/dl/go1.27.0.linux-{goarch}.tar.gz
      release-asset-aarch64 https://go.dev/dl/go1.27.0.linux-{goarch}.tar.gz
      base-image         ghcr.io/kapsl-sh/kapsl-base-static:latest
      composed-image     compose:git
  sbom      sbom.json sha256:c664aca22a370c5103feedb5c1e392d1...