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 simple and easy to understand.”
Google Play · 5/5 · 2026-09-18

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 2948162176

Proof data

Record hash (SHA-256): c89b3af8ed41ee68747d7ff2e615062c28a67e77177a252209b5333657e88827
Signature (Ed25519, base64): xcKB4lNiZNHNZeWHcU2vFWbIV6Z74I+Zn4udEhimGya5HhzMKdMavYVgOuYzuMfKYO0wremwXE5asocW8ZMQCg==
Merkle root: 5397210619679ac63434abd334c13f5aaccbd1dd184ad9d8cac5ebeceaa346bd
Merkle path: ["c89d26d4def7f39813864b3fcee081bf79351694f55521b8476387c7e105436b","244d4c7b99aa994e7cd3ab0d8a6176497dcd8ec171a4581ccc2ceddf7a49851a","1a4f0f644cb9ad01653befd405cc33dfb4858c5133657fa8ee8d05b168122a5a","697ff83a755e1ad849addb97873f46aaa1771f9d575fb3c4aec17bb10b240416","a089e4750acf028618c014045f2dc68170b469841c504fff4ee0ab13a25754b1","a3e2bc24023aa5698fb9400abb4bb1abeada18dba1b8fb46270d941a5139b4f6","c8e96c08dcd808c9cec9be53fde358cb7116cb05c2b15f67099fc9aefeae467a","d89f703964641a379efccd0c9b936ab60bd2a36bc54094f1023b1f7e76ea426a","34abf8b1463667874485cb2b8672c62a9edd03fcac04e46b29d8811ed6458d9e","0a715338c382853c361532cad9de3a3e6b592ae3af6e66fcdb7027d97860e1fb","9d52e13a7864d7529cca85a4b7c15a5f7242a077b239eeaf0146f44c46bf9c65","0a9a33c75948420bc9c46c8097da1b06f4fe152fd5716276fa9112799a085a6f","108f3d171e4ec3a22d208fe56e34b1a576bfa9e9f8a046f3c09e78ff42b08593","468adf75cd56eeaa89e39f50b974b405db9921529d680bbe88ff0d1caae6f316","77ebbc5a767f49a9f64068a716a8c843de0ea8d44adc624726bf46e2e415a41e"]
Anchored: 2026-09-25
Public log entry: search.sigstore.dev, log index 2948162176 · entry 108e9186e8c5677a61d4…
Expected log hash: 5ff8f25b7934b5d72d363d6805344624efba4d637f2c851f11783b259b9d81be 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":"v1790226990092","kind":"published-quote","locale":"en","page":"subtheme:zasta/quality/user-interface-simplicity/en","quote":"The app is very simple and easy to understand.","rating":5,"review_date":"2026-09-18","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=de.zasta.app","v":1}

Verify in the public log

Open the Rekor entry (pre-filled with this proof's log index).
In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (539721061967…), which ties this proof's root to the log entry.
Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
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.