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 simply can't do it technically.”

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 3240231023

Proof data

Record hash (SHA-256)

4931bbb5f2d46d574c17cb3221883d00cfa250446e60aee855901e1349b57ce7

Signature (Ed25519, base64)

HzmSPIjJIekhetT1VlVn00Y7RluHXGdJmCxpvTAWNOY4xutWTV/AtdUspeNUhKuRTcbcobkIqEyZgYwfRDBIAg==

Merkle root

888a38c73939ec95e6f226dbfb3637325026fcafc5a795aa4e227b811d6b2c84

Merkle path

["493345e5af1e9dd6a943c9bfe1b872a4b99c1d7492fad4ee14670686aa47881f","63f95eda95b5533fbfce165a4129e3c66660d423bab3f3a35dd9ab9e52598cae","c8461af33d2f575c2dd6557becb8aee4d8382c9f0ec9568688556fd5c860423b","46f52e6640fa61fecbd2da5fe3a3bdd80fe311e180603e9b6541c0da61c85628","6858bab7d82908719587450c90bc45a2d738214fd6c8f1a708eb9ffaf8968344","a0d73ee9b4de31156597a07003e62116bce9b1cb7e9b8c335a5423ff7b8b125f","4a61a762ab6a293ff8cdcf9fb544d0dbafdcadcc6653c1ede643f8bae7f91a75","854e918678c01473de3a7f8191756f4e4d05290ff9c94ea01f36db5b4580b0a1","78c6175d62866df694203bb08faa35593b9ecf3536cc992a2c897f52ebe9d182","1f70b99838a19d845b5e34ff52a66390f47806d507d5816f3a0088a6cccfd0b2","83db607e433fdfa67c0c3cdd2e09a24b4773b7db253781d62b43893cfe854418","cfcf82b47bc6a006b7c11e5183fbaa666e00ea4d950e64e1f574bdafde8e1583","410ad2e8ec6f218bef120c1cded3462a092f61baab59fee462fd9704d436d66b","f46648ad2fd9f2769b9fc0ba1c434d2040de67cbd8b7a61df7b7575cd5a9206a"]

Anchored

2026-10-13

Public log entry

search.sigstore.dev, log index 3240231023 · entry 108e9186e8c5677ac0ab…

Expected log hash

bc440cd3136178aee800fe49b9cf2e319542a645c9abbb8553c6ae1e354ce201 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":"v1791860805798","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"I simply can't do it technically.","rating":1,"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

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 (888a38c73939…), 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.