diff --git a/.github/workflows/snap-publish.yml b/.github/workflows/snap-publish.yml
index b15616fb1..a7ba1a5ad 100644
--- a/.github/workflows/snap-publish.yml
+++ b/.github/workflows/snap-publish.yml
@@ -17,6 +17,11 @@ on:
         required: false
         type: string
         default: ""
+      artifact-run-id:
+        description: Run whose snap-linux-* artifacts are uploaded; defaults to the current run
+        required: false
+        type: string
+        default: ""
     secrets:
       SNAPCRAFT_STORE_CREDENTIALS:
         required: true
@@ -119,6 +124,11 @@ jobs:
           snap_file="${snaps[0]}"
           snap_name="${snap_file%.snap}"
           snap_name="${snap_name%%_*}"
+          # Artifacts can come from another run, so confirm they were built for this tag.
+          if [[ -n "${INPUTS_RELEASE_TAG}" && "${snap_file}" != "${snap_name}_${INPUTS_RELEASE_TAG#v}_"* ]]; then
+            echo "${snap_file} was not built for ${INPUTS_RELEASE_TAG}" >&2
+            exit 1
+          fi
           component_args=()
           for comp in "${snap_name}"+*.comp; do
             component_file="${comp##*/}"
diff --git a/.github/workflows/wheel-publish.yml b/.github/workflows/wheel-publish.yml
index fa2ad83d0..451c6ed46 100644
--- a/.github/workflows/wheel-publish.yml
+++ b/.github/workflows/wheel-publish.yml
@@ -42,11 +42,46 @@ on:
         required: true
         type: string
 
-permissions: {}
+permissions:
+  contents: read
 
 jobs:
+  # Dispatch inputs are free-form, so confirm they describe a published release.
+  verify:
+    name: Verify Release Inputs
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - name: Check tag, commit and wheels
+        shell: bash
+        env:
+          GH_TOKEN: ${{ github.token }}
+          COMMIT_SHA: ${{ inputs.source-sha }}
+          RELEASE_VERSION: ${{ inputs.python-version }}
+          RELEASE_TAG: ${{ inputs.release-tag }}
+          WHEEL_FILENAMES: ${{ inputs.wheel-filenames }}
+        run: |
+          set -euo pipefail
+          tag_sha=$(gh api "repos/${GITHUB_REPOSITORY}/commits/${RELEASE_TAG}" --jq .sha)
+          if [[ "${tag_sha}" != "${COMMIT_SHA}" ]]; then
+            echo "${RELEASE_TAG} points to ${tag_sha}, not ${COMMIT_SHA}" >&2
+            exit 1
+          fi
+          assets=$(gh release view "${RELEASE_TAG}" -R "${GITHUB_REPOSITORY}" --json assets --jq '.assets[].name')
+          for wheel in ${WHEEL_FILENAMES//,/ }; do
+            if ! grep -qxF "${wheel}" <<<"${assets}"; then
+              echo "${wheel} is not attached to the ${RELEASE_TAG} release" >&2
+              exit 1
+            fi
+            if [[ "${wheel}" != *"-${RELEASE_VERSION}-"* ]]; then
+              echo "${wheel} is not version ${RELEASE_VERSION}" >&2
+              exit 1
+            fi
+          done
+
   trigger:
     name: Trigger Wheel Publish
+    needs: verify
     runs-on: [self-hosted, nv]
     timeout-minutes: 10
     steps: