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.

“especially for self-assessing content when uploading study sources”

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 3178600936

Proof data

Record hash (SHA-256)

57ee0d873192dcf5d94053a5e17c25f9f9e17fe9708d90a17d3decfbe3324454

Signature (Ed25519, base64)

wVG8S/Njdw681bVKK09ze5dEBfMmsrtesjH50/rfWXqWVoBaTSq9Q+OHmy0gaQsuR2uwtINt4Z4V+bTzEx9oAw==

Merkle root

eee462924587f8024361bc8d60043805cf5210f8bd2ef7667df06d093552f9e6

Merkle path

["57ede16f4ce429e9a615f307906d712269ad52106ff77b9a9022570cbd431ca3","d856d7da1b1bc3213db49dbf86015c4c8e44827541633eef47bfda221c35ca35","975cbf910e50b10fdd6c1d5c960174bf0184526e5d1c5fa18d5cbb23901d3f42","a4f0235da8b16f91a9bc5ac26747f5e05441ada43a2adc71338518c1770972ba","47913b396f60ccf9d363b51a1b876ed52391339f4acc5ac0c91897cb16772732","59cc809690941fcdc3ada5611601e9f4f01432886a10227fa61345ed80201be3","dd9ef3ce123d7359f894def27861a9c733ddb53af222f5c3fcf03ccd8f22a5a2","c1c7e8e0b4e4bea6127ddfa627b82924d69116fe090d35bafe637fd4a06544fa","5e73dbd973f616a2c4639b7bf7c1d00c8b281d3da51465d7f138ead209f79c31","14d8c94fc2c1f683db94640bb14161805bf546c4851c89b6fc260f54ed29dab7","a272ea85631737531680457c069a82b977e8daa62af41dc864cba40b587da483","4379fefad16ae8ff2ba5706e6ae4b477d1b2ce3cfd6e873ab8243a37cd5eee04","2a2a0e0a04556444a1f3e56af70f8f7d735501b2d557278ab2ea5948d291f4ab","a445a39a48770a8fbc5d87a405ed660d401fa810eac6fbd1d284a96f8c7d5503","452f4fcbca19997a15e6a6869c50e026ff02cb90a6ef21da106ee0457e55941a"]

Anchored

2026-10-10

Public log entry

search.sigstore.dev, log index 3178600936 · entry 108e9186e8c5677a6a91…

Expected log hash

f3dccf508afcb5e89d56dabc8c5aead85de215b1b896d057d463ea1c1bdb13a3 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":"v1791606586319","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"especially for self-assessing content when uploading study sources","rating":5,"review_date":"2026-09-17","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 (eee462924587…), 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.