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 is really helpful and give understandable explanation of concepts”

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 3240422411

Proof data

Record hash (SHA-256)

42d011e0f351c46711e6ad1f199ac7812921fcfd5e904db0194b36e758675e85

Signature (Ed25519, base64)

9ZIWMFyMkrS0QdPuZET8es2ZcPh0kgzubrL9G4s6KXe/u1HA9lP9SfJPyUkN6Am7de6zgbzEpnqZLodHkc9gAQ==

Merkle root

825dbc6ca55f00c6c81d8de0f7a080bad31b79dfa0e721dee7ded0e9c294ebb9

Merkle path

["42d8b894189eacc09b87593d1bcc8f431fb98e4b945d89128cf4aae5ce3bca65","ec5adf80a651e3aef27112181b4fed14c0437c13a8a7c7247b0b66c0e2623d8a","ad08d6f055602731cf7b12e2ff7191e79cacf742828c28de3e87ca923083eb33","2ba138e79eab1fee703bc97e47f47a2668b19854a255ccafc6698ef789f2022b","2656022eedef1a84f2e7757bcdd3545f59c6db92e0bb19b299b3f2a479f4eb8a","56bd4839858d4aece82b0ddbbc712e2a6ad65bb0e7eb6396dd962fcacd680f31","cf66a7c536d539b145b4a25803da1cbe2d78b436bc31fa638e097eec31090884","a457563fabd339a74a060817908be59cc554e9bb1fcaf4a55dea789ffaf94b78","4aaee8e2f5176faa89530c5fa5dd66a7800d04394f16b3fbc57dec879e65527d","f819d222e3c138cacb2d21befb04495849ab9f599ca63493ce4e7385dc8a1b87","c8b7d8e613e305123bcaa9af1ed1a7d0c72af972c727013e1367bc0e5df8173c","0526b5b7adf235fca820e27d7e9bb58328407474fe694c840500fecede0e4f46","1e2e9420d8c4747dca96dc342727525f4c47cf2390ef42ad69829fe37156235c","04c4bd8a9ef95bf5648c9d023612bd1f2446e83a6dcf83e612d031a5ea30e90c"]

Anchored

2026-10-13

Public log entry

search.sigstore.dev, log index 3240422411 · entry 108e9186e8c5677a0ea4…

Expected log hash

8667b0db28913263098c19cb6387cf64b6d68b1b8f2c4242d3139d96cef5da0d 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":"v1791861703078","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"it is really helpful and give understandable explanation of concepts","rating":5,"review_date":"2026-10-06","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 (825dbc6ca55f…), 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.