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.

“There are dozens that offer the same service for free.”
Google Play · 1/5 · 2026-09-14

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 3220996539

Proof data

Record hash (SHA-256): 47ad52a864b95e579408be934e07889f57f1b62d070f54f1766f95123af4f9e7
Signature (Ed25519, base64): zhjGt7K/t2+zDdjvSVQsOdLnii1bKHU/XBQLVgOeLaYLi87eMLFosOsgZoh20N2LMNhoTNhasN8rR03593WbCg==
Merkle root: 1b0b408c7cf60721bf3cca50f4b7f268b0858a42fba11906e486c6694252cb22
Merkle path: ["47a9a37f4ad72acceaa8eab840febeb38ec0deca9466b932bce8ef63eb7b08d8","513d74f2a043c5ca493433e91bb27ea1e3bf85e761a0465fd690eab33a7186b7","7742494eddf9b97b59e84fed33f575c831282f423391a3f86ded80aef41a42a3","bf0521b5f97000ea68d6668ddf42d4aa8ed33c45694396134fc9182fa9303057","c7035e5648012a93178de4514b26d6e6cebc0b44ca83f6685173c86ec5ff9ca2","5aa633023a5feb06be6270a5db19515a9f79e504d60127a9ee3c176ed20b97ad","25732a548f11aa067b5480de909bb292d70d90f5dcae485de48852e5ec1cada3","629ce889833bc86743af55e694ee5da3724b53374040d35249ddec1c107a6606","35c60780b7b050e64bf2401f52c50b5724ffe5d6b563f24a89da14123208ddc2","daa958bcd11247c68ae01d88f1454c1c0fba653efa4c542dc572c5e2852b2510","2325b204cb902d18f6de3066c2e32c0b1ef80713e8508931f526dd37f3293ba4","02a91e84dd419fb91142eb41d22148d6364f823a8ddb534904911b59b684dde2","bd64ca269edabfbd30efee623435236838862399942a0d08ad142d3df41d1142","8547750c311d384cbb1a945300d6b6fb4f4bd2b78af7177366b3baa4b4c1e724"]
Anchored: 2026-10-12
Public log entry: search.sigstore.dev, log index 3220996539 · entry 108e9186e8c5677add5d…
Expected log hash: 00694de1434e648cba57bf07fb439ed90ba501083441667555bcf619bf5edce8 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":"v1791779426071","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"There are dozens that offer the same service for free.","rating":1,"review_date":"2026-09-14","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","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 (1b0b408c7cf6…), 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.