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.

“it explains what you don't understand”
Google Play · 5/5 · 2026-09-16

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 2907673729

Proof data

Record hash (SHA-256): c0e17c6e622f5be9b00a1a08651f0b83ffe563aefa0cf9fdcf4ae2620fdcc9b8
Signature (Ed25519, base64): zdSlIm/t1dZrHhKbLCjIJ5xiMww/838AAmJwVCgYVgY/wMcsXn3fCTeJUIHTJmR29OWxd3H/ZtLyBKtm1xhOCw==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["c0ddd114312af12c25ddfea72ec7ee5581a26586d5704582517d94e1b9c39703","197f9b97774b737870ab0e7a2ecc9f348b61cc93481d9e4563ab6a977eb0204e","3a444c26f244ed8c5e54ee47494cf548d5d5dece4595a90bb3d692d30655042d","09b7410d3d34210effec136939894d13e0e72ea0f673fce0d76850284d85fd25","01fdb71ed5ec01a5544eed246afae01e4b3806fe6bf157dfcf4298995bb62f9f","1dc6635225861f2816842dedffd62d6a4185531f52902561c50ca2eb94ebe2ee","064bc1fd45854d1016ef17ecb0edee708c5dcf82f7c0bce719d45bc7899c73a1","812451657d713af3d23385f9cfe7abb01fd5a2b2440e56551c01254172ff7f45","0e1c711989817095b76e3afcb7a187151fda619859f564e37ae5b5680ca9e991","8d1e6880fbd5e13ac0f1e21b875fa169bdbb8a65449cb7c0b2f9074a1e15e99d","d6d7ec5b8671612f1afda6d1c341da4ab277e6a515ef03b097a08ef2f21b6a1a","8e90fbff84453d26da9a25ba9530d677aecf62355e82abaefcef4642ecd6818d","ff0ce3b59f4b6fff6b806e01d20d764fb2b7a5651693c19ab4bf8a8b5ce5f968","05978e8b9ad5fd39833c65b8b951e8c80cf426334c441fa8a8bff8eb8eeaf534","4543e8b9ac7bd077d9526acfdae449f0a0d5517cbb42414f50ef930ecdb9470b"]
Anchored: 2026-09-22
Public log entry: search.sigstore.dev, log index 2907673729 · entry 108e9186e8c5677a06ea…
Expected log hash: bf9a74000249ba6e66b1e29aae9d8cb95c3400dc118569a80e5c0949f3e8ac62 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":"v1789969984102","kind":"published-quote","locale":"en","page":"theme:vaia/service/en","quote":"it explains what you don't understand","rating":5,"review_date":"2026-09-16","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 (b9a08f9d6d76…), 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.