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 will explain and help me memorize as well as understand it”

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 2904877428

Proof data

Record hash (SHA-256)

9474faea617abe7656fbe5065462badf00f471f8026bac78e6e297fd994b3c3f

Signature (Ed25519, base64)

mtf5c8UQWSmZJ2Lle3fsfyfBLzh2PlwdRYNDdiJpnono1xF3CnDHTVuw5kfVeenOQByylHpJRad0e8uYN1NyCQ==

Merkle root

e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef

Merkle path

["947694bc5b1e555e31d328f12fab2c95fa018609ed9da3ac302e5e6dd241db26","b13af33b691a769c1e7dbd48dbfd66e82f90b6dcfdbafee7d97c9d73432d4fa9","bcd6f1cb68be43b8a1fa72b97261dfd62504581ed7ca63d262f348983139173d","9685098c985513cb972e3ea5270d9399c26f597cd0a39fefe065f9073a96d88b","30c77fdc0ff99d57484aba2dfcef91dc2bd5e77ee04ce5a294789f200df7d572","8f0143df8f37469560a0479b9f6f40a8994645bf5ac43b65bb67c8fb22dabc14","b0cff56d549ad683275c001a304bc786e4252d1845bce4c76150a947f1625548","9e6250ce3965a9bf340027ef9e6cc51ac1f87e9ee71be074f8626945fd506f72","d6b238952f2807d230b79a09266b682ef788a5c7e3a1a7223a8c6c6a23f736de","ff1ac9526ebfebfae03ffcd9a5d8cdd3e896f2f805d0aa8b855b0f87c72e07cd","808361c2cc11d1d62da97f81cb8537cc3a8a9e7c2b553285d63cecf18a95be4f","81ae0d98613af401743ec4987802323d53d8fda24ce374cdf2d369d04f6e8e3d","b5d03b72964f911025dbd61c2eea673598b47768b7619e9a279966a44a138147","e3714293de39ce3c6e3cb9d5ea7711343b19d2be532c75504682d8ef52e8f91e","2a462314156907e42d6f0d96eed96123f1d79516aef73ed189d9f5466556b638"]

Anchored

2026-09-21

Public log entry

search.sigstore.dev, log index 2904877428 · entry 108e9186e8c5677ab408…

Expected log hash

d020708737f55ccdf49203f373fcbcefe8158cc388605556fbfda3c365de7360 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":"v1789881486272","kind":"published-quote","locale":"en","page":"theme:vaia/fit/en","quote":"it will explain and help me memorize as well as understand it","rating":5,"review_date":"2026-08-20","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

1. Open the Rekor entry (pre-filled with this proof's log index).
2. In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (e299bf38720a…), which ties this proof's root to the log entry.
3. Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
4. The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
5. 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.