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.

“I definitely recommend it to the students who don't want to spend 4 hours a day just to write a summary of what they've learned”
Google Play · 5/5 · 2026-09-13

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 3258071454

Proof data

Record hash (SHA-256): 2f507e1b3c6f2f559964cfc4ca25bd9ed5f193d76f3cbbac36422c725bd24832
Signature (Ed25519, base64): ZBzOdgBz9nAoHKoRRGgA9X/tE1VEzsNgLfu2IH5CaP/fg4chQGTitmw12ZMiq2l+McgtCvyTvcrU4OAuPT18AQ==
Merkle root: 3286418fc06d25de584969d1d1d5f4b079918bf6b5a5178364cae8b78bb351b2
Merkle path: ["2f43a5f883b3d32f79678b0331e5835e472f7de556d48f12d4fc0dc16fc66d36","5b389ca69a9341ac0703b0b1cd82b695480ff8a8a68d9e2794744d8d8b9f4b4b","a986b1d5e66c7ff5247990b8521098451732e002355dbb2150835f208dc71d89","3893ebb417c066fd67cda6011227859317c946dbbf9ac9ffb519d754f879a4e4","3ddd6408678e6a815d1987e00ae020ab95893338972dc8efb9d1851ff96e732e","fcee7d86681af640563e6568679d252b4484c10a986f38affa4f8f7814ed4dce","b0218d33c0a0b052d62d3d0c2e1949d19480aca7f1836b83654975c6ad748af7","59f09aa1b31de0e6c459d7ef64fb262f2ee2beafdafb4ae2bdd6984ba2660a0f","f2a6ba00e99637ed8d519cadbce1488aaf06289694223b5682de68d6f35f7a33","70703bc896f8d3850896304d915e4569aab5082e9e5cfd8015a47a1a4eff58a8","fbf0beecd3644a0b1ed85afe1d822ac72eb6c6fefbbb832dbc0449418be397e1","18f743e4293ac0f418bd2370e18523fb86a3c1df20723b156051657b751cdb54","d9800b1b87d047478eeb89f8a1dda19593d3b273c40fa6d591a1b944763f5e83","b4d8773b8032d1dec9dc6fa4ba1d52baf4d9efac6a7cb542ab0617b855dc5284"]
Anchored: 2026-10-15
Public log entry: search.sigstore.dev, log index 3258071454 · entry 108e9186e8c5677ae2ee…
Expected log hash: f9026b3bdc4a2e986a01140b2370b0ce9ec3e7c9353055dd7c9909c6a9941809 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":"v1792030101458","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"I definitely recommend it to the students who don't want to spend 4 hours a day just to write a summary of what they've learned","rating":5,"review_date":"2026-09-13","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 (3286418fc06d…), 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.