diff --git a/.github/workflows/release-container-image.yml b/.github/workflows/release-container-image.yml
new file mode 100644
index 0000000..cfc4081
--- /dev/null
+++ b/.github/workflows/release-container-image.yml
@@ -0,0 +1,168 @@
+name: Release multi-arch container image
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+      - "test/**"
+  schedule:
+    - cron: "0 0 * * *" # Run every day at 00:00 UTC.
+
+env:
+  REGISTRY: ghcr.io/${{ github.repository_owner }}
+  REGISTRY_USER: ${{ github.actor }}
+  REGISTRY_PASSWORD: ${{ github.token }}
+  IMAGE_NAME: dangerzone/dangerzone
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - linux/amd64
+          - linux/arm64
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Get current date
+        id: date
+        run: echo "date=$(date +'%Y%m%d')" >> $GITHUB_OUTPUT
+
+      - name: Prepare
+        run: |
+          platform=${{ matrix.platform }}
+          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: |
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Login to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build and push by digest
+        id: build
+        uses: docker/build-push-action@v6
+        with:
+          context: ./dangerzone/
+          file: Dockerfile
+          build-args: |
+            DEBIAN_ARCHIVE_DATE=${{ steps.date.outputs.date }}
+          ## Remove potentially incorrect Docker provenance.
+          #provenance: false
+          platforms: ${{ matrix.platform }}
+          labels: ${{ steps.meta.outputs.labels }}
+          outputs: type=image,"name=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}",push-by-digest=true,name-canonical=true,push=true
+
+      - name: Export digest
+        run: |
+          mkdir -p ${{ runner.temp }}/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "${{ runner.temp }}/digests/${digest#sha256:}"
+
+      - name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ env.PLATFORM_PAIR }}
+          path: ${{ runner.temp }}/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    runs-on: ubuntu-latest
+    needs:
+      - build
+    outputs:
+      digest: ${{ steps.image.outputs.digest }}
+      image: ${{ steps.image.outputs.image }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Compute image tag
+        id: tag
+        run: |
+          DATE=$(date +'%Y%m%d')
+          TAG=$(git describe --long --first-parent | tail -c +2)
+          echo "tag=${DATE}-${TAG}" >> $GITHUB_OUTPUT
+
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: ${{ runner.temp }}/digests
+          pattern: digests-*
+          merge-multiple: true
+
+      - name: Login to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      #- name: Docker meta
+      #  id: meta
+      #  uses: docker/metadata-action@v5
+      #  with:
+      #    images: |
+      #      ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+      #    tags: |
+      #      type=ref,event=branch
+      #      type=ref,event=pr
+      #      type=semver,pattern={{version}}
+      #      type=semver,pattern={{major}}.{{minor}}
+
+      - name: Create manifest list and push
+        working-directory: ${{ runner.temp }}/digests
+        run: |
+          IMAGE=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.tag.outputs.tag }}
+          DIGESTS=$(printf '${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@sha256:%s ' *)
+          docker buildx imagetools create -t ${IMAGE} ${DIGESTS}
+
+      - name: Inspect image
+        id: image
+        run: |
+          # NOTE: Set the image as an output because the `env` context is not
+          # available to the inputs of a reusable workflow call.
+          image_name="${REGISTRY}/${IMAGE_NAME}"
+          echo "image=$image_name" >> "$GITHUB_OUTPUT"
+          docker buildx imagetools inspect ${image_name}:${{ steps.tag.outputs.tag }}
+          digest=$(docker buildx imagetools inspect ${image_name}:${{ steps.tag.outputs.tag }} --format "{{json .Manifest}}" | jq -r '.digest')
+          echo "digest=$digest" >> "$GITHUB_OUTPUT"
+
+  # This step calls the container workflow to generate provenance and push it to
+  # the container registry.
+  provenance:
+    needs:
+      - merge
+    permissions:
+      actions: read # for detecting the Github Actions environment.
+      id-token: write # for creating OIDC tokens for signing.
+      packages: write # for uploading attestations.
+    uses: slsa-framework/slsa-github-generator/.github/workflows/generator_container_slsa3.yml@v2.0.0
+    with:
+      digest: ${{ needs.merge.outputs.digest }}
+      image: ${{ needs.merge.outputs.image }}
+      registry-username: ${{ github.actor }}
+    secrets:
+      registry-password: ${{ secrets.GITHUB_TOKEN }}
diff --git a/dangerzone/updater/attestations.py b/dangerzone/updater/attestations.py
new file mode 100644
index 0000000..90bf152
--- /dev/null
+++ b/dangerzone/updater/attestations.py
@@ -0,0 +1,92 @@
+import subprocess
+from tempfile import NamedTemporaryFile
+
+from . import cosign
+
+# NOTE: You can grab the SLSA attestation for an image/tag pair with the following
+# commands:
+#
+#     IMAGE=ghcr.io/apyrgio/dangerzone/dangerzone
+#     TAG=20250129-0.8.0-149-gbf2f5ac
+#     DIGEST=$(crane digest ${IMAGE?}:${TAG?})
+#     ATT_MANIFEST=${IMAGE?}:${DIGEST/:/-}.att
+#     ATT_BLOB=${IMAGE?}@$(crane manifest ${ATT_MANIFEST?} | jq -r '.layers[0].digest')
+#     crane blob ${ATT_BLOB?} | jq -r '.payload' | base64 -d | jq
+CUE_POLICY = r"""
+// The predicateType field must match this string
+predicateType: "https://slsa.dev/provenance/v0.2"
+
+predicate: {{
+  // This condition verifies that the builder is the builder we
+  // expect and trust. The following condition can be used
+  // unmodified. It verifies that the builder is the container
+  // workflow.
+  builder: {{
+    id: =~"^https://github.com/slsa-framework/slsa-github-generator/.github/workflows/generator_container_slsa3.yml@refs/tags/v[0-9]+.[0-9]+.[0-9]+$"
+  }}
+  invocation: {{
+    configSource: {{
+      // This condition verifies the entrypoint of the workflow.
+      // Replace with the relative path to your workflow in your
+      // repository.
+      entryPoint: "{workflow}"
+
+      // This condition verifies that the image was generated from
+      // the source repository we expect. Replace this with your
+      // repository.
+      uri: =~"^git\\+https://github.com/{repo}@refs/heads/{branch}"
+      // Add a condition to check for a specific commit hash
+      digest: {{
+        sha1: "{commit}"
+      }}
+    }}
+  }}
+}}
+"""
+
+
+def generate_cue_policy(repo, workflow, commit, branch):
+    return CUE_POLICY.format(repo=repo, workflow=workflow, commit=commit, branch=branch)
+
+
+def verify(
+    image_name: str,
+    branch: str,
+    commit: str,
+    repository: str,
+    workflow: str,
+) -> bool:
+    """
+    Look up the image attestation to see if the image has been built
+    on Github runners, and from a given repository.
+    """
+    cosign.ensure_installed()
+    policy = generate_cue_policy(repository, workflow, commit, branch)
+
+    # Put the value in files and verify with cosign
+    with (
+        NamedTemporaryFile(mode="w", suffix=".cue") as policy_f,
+    ):
+        policy_f.write(policy)
+        policy_f.flush()
+
+        # Call cosign with the temporary file paths
+        cmd = [
+            "cosign",
+            "verify-attestation",
+            "--type",
+            "slsaprovenance",
+            "--policy",
+            policy_f.name,
+            "--certificate-oidc-issuer",
+            "https://token.actions.githubusercontent.com",
+            "--certificate-identity-regexp",
+            "^https://github.com/slsa-framework/slsa-github-generator/.github/workflows/generator_container_slsa3.yml@refs/tags/v[0-9]+.[0-9]+.[0-9]+$",
+            image_name,
+        ]
+
+        result = subprocess.run(cmd, capture_output=True)
+        if result.returncode != 0:
+            error = result.stderr.decode()
+            raise Exception(f"Attestation cannot be verified. {error}")
+        return True
diff --git a/dangerzone/updater/cli.py b/dangerzone/updater/cli.py
index 9eab01e..42fe58c 100644
--- a/dangerzone/updater/cli.py
+++ b/dangerzone/updater/cli.py
@@ -101,5 +101,54 @@ def get_manifest(image: str) -> None:
     click.echo(registry.get_manifest(image).content)
 
 
+@main.command()
+@click.argument("image_name")
+# XXX: Do we really want to check against this?
+@click.option(
+    "--branch",
+    default=DEFAULT_BRANCH,
+    help="The Git branch that the image was built from",
+)
+@click.option(
+    "--commit",
+    required=True,
+    help="The Git commit the image was built from",
+)
+@click.option(
+    "--repository",
+    default=DEFAULT_REPOSITORY,
+    help="The github repository to check the attestation for",
+)
+@click.option(
+    "--workflow",
+    default=".github/workflows/release-container-image.yml",
+    help="The path of the GitHub actions workflow this image was created from",
+)
+def attest_provenance(
+    image_name: str,
+    branch: str,
+    commit: str,
+    repository: str,
+    workflow: str,
+) -> None:
+    """
+    Look up the image attestation to see if the image has been built
+    on Github runners, and from a given repository.
+    """
+    # TODO: Parse image and make sure it has a tag. Might even check for a digest.
+    # parsed = registry.parse_image_location(image)
+
+    verified = attestations.verify(image_name, branch, commit, repository, workflow)
+    if verified:
+        click.echo(
+            f"🎉 Successfully verified image '{image_name}' and its associated claims:"
+        )
+        click.echo(f"- ✅ SLSA Level 3 provenance")
+        click.echo(f"- ✅ GitHub repo: {repository}")
+        click.echo(f"- ✅ GitHub actions workflow: {workflow}")
+        click.echo(f"- ✅ Git branch: {branch}")
+        click.echo(f"- ✅ Git commit: {commit}")
+
+
 if __name__ == "__main__":
     main()