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.

“You select a flashcard type, but it still gives you questions in whatever format it wants.”
Google Play · 1/5 · 2026-09-12

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 3241341297

Proof data

Record hash (SHA-256): 4490c611fa9b0da9ff1c98062cc8e4e383e4cdef7daeddaf98118ea38641ebd3
Signature (Ed25519, base64): ID6N82pp8DYpIQE47cuGEkRgnGskSWoh34b1xduJ+xZHuim4KlFcnSYiPn+urdc8eToD8FYxvXsi+RoJfTH5Cw==
Merkle root: 4900b1080bdcd3b4c9234f01647614e7004e0a1ae01ead44968e31abeab33265
Merkle path: ["44904168a60e2201aff958bdb533ba79793e04ae7f737143ac38056b9d9d014f","6d071a387333ae195161b688b1574df5e8eb0104fd5c162a863974e1e7554236","cde2e3247cad160134790a8388cc68fb23833ef48e493e2d62f7cf597bd331f3","a986605a29c697a73d26d2a908503563435ca1ec8fdfc760ad40c572afe6a50c","797776bb9a5190c34001b161bc50cf1e9bdaa452a8f3d815eda793007648d18e","972821247abcff5c8850e5aac3c57a73d3acb041548e7e3761af78bf925125b6","9dbb6817c3f681af786fcff8df1802581443de39673a4374457f09d9cdc62b16","566e07e8a9d3d78783a07aec43449b9d3786156f325c39d4a6366eefc9ed9d23","4dda167325824ba6d21ad2f7e4e1398e086f82856d97a81a8488d6671b2a35b0","b14f040c619a7b536394ce1f65e7df3fdb31940c94253761eb726f3abd5fe045","cd3e9be594270f97347d23985c19ac899631a6773a3076c34d54ac880cc95482","1a39eb8110f60cca7b5d74c4b4e1ee494aba4bfcd1f4082136542cd2a427ac26","acc667d852c71a0e84a086ab20f7bbad3d8ae083a1e44cd20501ad641f662bdf","0a4842003c61f69c5923b6aafd56426e7fe934e483f7d15b620c07fa61f89152"]
Anchored: 2026-10-13
Public log entry: search.sigstore.dev, log index 3241341297 · entry 108e9186e8c5677a0e53…
Expected log hash: 39342fbb95f8cce5be4111719e5450984494edcdff99b8bd9a5c0d2303b67943 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":"v1791866192176","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"You select a flashcard type, but it still gives you questions in whatever format it wants.","rating":1,"review_date":"2026-09-12","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 (4900b1080bdc…), 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.