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 is very clear”
Google Play · 5/5 · 2025-04-22

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 3140627354

Proof data

Record hash (SHA-256): 923c22965f7298d8377a71bfa44b965f45d60ca34096bd4fcae2d6c6e7135618
Signature (Ed25519, base64): RHf18dGShvRi+kUZ9RQ54TG3YSfzWvC6aLR8MgNIsFZrFu/zebYgGrllw7VT4gVb3WMZOQPTviWpTeFO63kKBQ==
Merkle root: 7e5597bd3c162c8b6d828ec7450367f642ce11ee386de414b88376dcbb621ae5
Merkle path: ["923636fc1bac81bf2a644f9d2f181c8687b56cd837172509cb60fb5db6fc17f5","5462bea5b58bcdb70a5d0c280a52846f09a7169d59623f111e53890a1b6e4f2a","f1f0d596aafc5cbfc73dec8db6e0cde31dea442270a2a95559beef7e8a596e58","3272540777c4e5a021824f840454ad9666e9daebc9d4b2b7dce7fba139d30a93","05b6e29f16580f37fe475b7cb882f7e57a4bbb9673c3b402880ac1f612b92330","97698f55d0f2de7dadbae6bc071b92ab55a87d7ef08b254833fe3216078a2734","673a30d05da397f511038657f8edfacde2265ef28b91df65a39c1dac57feffd1","f756cfbefa73e7621a45f28ebdafb63e15928224ec69b575c1bb1b4fcd385364","37b9f501d0ea5cc3f8a3b8f4ddd8f9780e58989b4d56f7e2dfc67cc7f12fe53e","3380726afa36d4a8faa2d8e56d3c2eee7459fccacda936a3ffd05d65045a1ef3","77161770490fb8d774927603323b3aaf0841b3be9cbcb58842d0898b0506b437","7aa94b43bfeb67ff792077bcbdb940b346a917c6639dfa708142ba584bac6f12","c00a6a8e0eaf8442cd4e55ec120c0bab22fdb2edeb08c89262f10264f3ec3df6","5fc193f72843e5ae060e028dd49b5ed7a5ae6baed3b43902a359628ad39c7321","76edfaff3d5907039be8c493f114c2f6ba10fbab7705dc7ab77a269ec79893bc"]
Anchored: 2026-10-08
Public log entry: search.sigstore.dev, log index 3140627354 · entry 108e9186e8c5677acc98…
Expected log hash: 82c9bd063e624267c60865e2416c3d714724e2c3b18c4773424cdf17232dd6f1 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":"v1791432333296","kind":"published-quote","locale":"en","page":"brand:concordia","quote":"The app is very clear","rating":5,"review_date":"2025-04-22","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 (7e5597bd3c16…), 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.