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.

“The app is very clear and easy to use.”

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 2907673729

Proof data

Record hash (SHA-256)

b823c244494e78213bf8ceccf4d21a7b7213d70ffc9e7abe7e89ec17cf7793c5

Signature (Ed25519, base64)

oxL8QftVD7UkKOsb3gP2/xsi15yWthMqrajJzQ1c2F5BtnAeXeG68C5pdR59GW8fqqTxb4xhNrbdHMfG1W3aBA==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["b82386f6e08368e879380480a2ddc8956efd289d825e7d7d406cd7fb64be0231","3eba0eb139556b95245b80106489db95bac823e6961eeb20e66a6b874ab9cd42","94eaa171870e12692e532cc4fe0a20d9a572986c1f5063b3276e59f01f40dadc","5509ab1e9c784981bf365ec967349948a895d33d3fea62841a797c56d28a29f5","395fe071443a4569655e2590e173e376557fe9e1d0a526781f1f7ef931792790","8133f195f50f48f16882361ef44eeb346489c8a3cbbc93b411154933912a562b","86354dfda13a64cfa1cc17f2a94dc2c715f92b5b0c1a64457110b5d0711f8008","30e417c36c9dee555db88d1acd2e302b2f547e75f0e56b6eca80c25be319d4f5","dc3dc962210770bb9eb03e00a739c20320f9b77211760353f39124c0292736f9","f594ec1eec9c0c5b9e5f3c1cc12e679bc40092e5d751c2ee41d00492ef5e47ac","857e3ee1e9d95b5a725ef6d292706233d4b7b1774706be7cce942c5ef1551bcc","8e90fbff84453d26da9a25ba9530d677aecf62355e82abaefcef4642ecd6818d","ff0ce3b59f4b6fff6b806e01d20d764fb2b7a5651693c19ab4bf8a8b5ce5f968","05978e8b9ad5fd39833c65b8b951e8c80cf426334c441fa8a8bff8eb8eeaf534","4543e8b9ac7bd077d9526acfdae449f0a0d5517cbb42414f50ef930ecdb9470b"]

Anchored

2026-09-22

Public log entry

search.sigstore.dev, log index 2907673729 · entry 108e9186e8c5677a06ea…

Expected log hash

bf9a74000249ba6e66b1e29aae9d8cb95c3400dc118569a80e5c0949f3e8ac62 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":"v1789969984102","kind":"published-quote","locale":"en","page":"theme:vaia/ordering/en","quote":"The app is very clear and easy to use.","rating":5,"review_date":"2026-07-18","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 (b9a08f9d6d76…), 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.