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'll definitely recommended it to every learner, reader, editors”

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)

18dfcb3cee545223c5c76a53e2dd3f78c1c6388ff198875926532babc742c417

Signature (Ed25519, base64)

eKV6yb7gdCZ4dldZ1G4t0jLKc5JVzZsnBwaP2VVYgHBQMYJyvk0kAjM9iGjFrQV0l+iu7aA0Fkl0F2w690kOCg==

Merkle root

888a38c73939ec95e6f226dbfb3637325026fcafc5a795aa4e227b811d6b2c84

Merkle path

["18e180d6a4add091d02b5f08b08984aff8101b874a218d3f7c6153f37002eebd","53abf44ea222cb1831abc6e064ad4d46eeb67571942efd6592a576c4be35b66f","909d88ba9c12cfe8408ce5eda79b674df88a73df4327a9697af6bef519731a21","638d8dfbe3abe2a531df2a381ea0ce028b3b7c09cbe29011864c29c08db5c869","26ce30930902059276aa9a92661215be391d5483ce3b71254d15b5014a202a15","4d4674f41588d00a782adbe671af4d5de7ae390bef665a37b3bdd35049ab8001","e3a0e9ca83d7889e98ad6b2035ff26d953f514815a85f2ab1d1e39ee952b0cf1","57a3e94fc1a214b987e6e8c532879bfb11c7fd161b2ad86b2bbbc8525981a329","67aca940793f635301d30bd397257c28103a136fcbcf7f31d95900b71748134e","a5fbf0c21b8acc6c3c93b6bd5ee7017305f498f525f0d5c731cdd805e90d8c42","36593ff6981142345d894360aba2045a8b70ebe4ed0dd9f3ba3c7292169f7244","062cbbfbeb4fd46f2079783d29fb5f6cef5c48e70dbb9c2980860cd1d92ebf74","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:xodo","quote":"I'll definitely recommended it to every learner, reader, editors","rating":5,"review_date":"2026-08-01","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.xodo.pdf.reader","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.