Quote verification

This proves the quote below is recorded by Citatio exactly as displayed and has not been altered since it was committed and anchored. It documents Citatio's crawl observation; it does not imply endorsement by the source platform. The quote links to the original review.

“The app works”
Google Play · 4/5 · 2026-04-13

Checks (re-run on this request)

✓ Signature — Ed25519 signature over the record hash, verified against the public key at /.well-known/citatio-signing.json
✓ Merkle inclusion — Leaf recomputed through the sibling path to the anchored root
✓ Public transparency log — Sigstore Rekor log index 2893887498

Proof data

Record hash (SHA-256): af52321b3ebe6e8f1be66731bcefeae0aa08ca61585ca6f1577ce10d0bade4f0
Signature (Ed25519, base64): a6jemzNcYbNo/IFyJhRQy6Gludvtq0VCELJz0aXWZb78jSZnoz/LAbL+jQyIzoOWhhlYDD7sgK1fLHtTGuqPBw==
Merkle root: 2f068f3de56bebe7a575ba4a979c9244445d2350140e36238e088fa40fbfdd88
Merkle path: ["af519dde05f82c4cd19718e78ab88d4df1aad0b2eb589fd6e242f34b3aa1573c","86441cb2f4d040053fb9e7197bc0b06fe41ad6fbb376bf7f4c2fda8d5e546e95","f1091da69afcbc4c545cbd0b1e0ddcd372baf314e336d567ef1ca3499b770d55","5e9540581d6a7f9451db412916b2f0e24dedce5b85b69bf191b365a65890396a","041f92e2b4966e055f98a522bb750b84c3b58cccac752d5edd58cd111ae1490d","04b8ed831dc67c2756b3af0ae453c643c65fa81e4e4565eb65784976c31dbb9d","0d0273a880630218de877ed1f735189b1ae25a94719fe2e832f5dbd99dd465b5","52318bae10464ff0c670d8e9ecba28d37b8005c6efb5fbf46d6aa88cdc0a0b03","3f0a6c1a869317b67a71924015d7ca1609eeff2e82772c4c08d397364fcfb60d","289a288a3dd99531088a0a5a04240a7cd0a08cfa94a37d50b01d83e5e4bad9e8","86c12730349fc5d6ac0f2950e37fc472c8263259c13a59ef5e1e26828166b9d7","bcaffb66f7637f1faea00b39e1b086b5c8748b956d5fec046d9c8718408ebc96","27978d996981aec54e7305bc9bddff422c8ed02487f8eaef12f84d0b2ba90b9f","537f00dd60bfbd8c049786f7eae4da8a735af5b60dacd3bc1b6054b8ac3175e3","58a3dfc9ad8696e92f5fc9960e9c6bc4cc04e270091b574a948593298b33d1f5"]
Anchored: 2026-09-20
Public log entry: search.sigstore.dev, log index 2893887498 · entry 108e9186e8c5677af79f…
Expected log hash: 90099e0300c6e23b62e79318296ebab91bff130379d248ada57f044f77e72ccd The log entry's spec.data.hash.value must equal this value: the SHA-256 of the Merkle root string above. Recompute it yourself from the root to confirm.
Canonical record: {"dataset_version":"v1789796056710","kind":"published-quote","locale":"en","page":"theme:concordia/quality/en","quote":"The app works","rating":4,"review_date":"2026-04-13","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=ch.concordia.myconcordia","v":1}

Verify in the public log

Open the Rekor entry (pre-filled with this proof's log index).
In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (2f068f3de56b…), which ties this proof's root to the log entry.
Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
Locally, without any Citatio infrastructure: SHA-256 the canonical record (must equal the record hash), verify the Ed25519 signature against the public key, and fold the hash through the Merkle path (sorted-pair SHA-256) to reach the anchored root.