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.

“Zasta helped me a lot.”

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 3248278454

Proof data

Record hash (SHA-256)

bc483da9dc17da52fb123ad0bb6d21a164fef832203e41cb46f58bfaa9e25b95

Signature (Ed25519, base64)

sm0ZZQB6xgacIR6t5I+R4dIWm+0UqnQeuy13uaKlsHy/8ekYr460DE7XwaMRW2EtfjGR36c7oZl3rDYB/+j+AA==

Merkle root

81db1abd6b6e636da393518bb64e907fa9c48581b44ac2be5a9e74d02608e451

Merkle path

["bc4eec3e35ef10c5ccf326c6324cbde8c162c5824ae9064c87aea2795ebb3c3f","23f878a557681b5f03a8284b817824e119d4d1e91d82dac586bad834e2e30537","6db4b80da0468d40523bdb553a364b031677b90a3f7b8c55392cb76b8c18f707","31244de920b8b646afd0829aad69efe001b436b6111e414a17336e6518d8f7aa","f40ee4ce4cfebf3c7a15b54f90aa26683a92376f4b9f3c9d56eff7179b08b0a0","4bdc5254e98266d568cc790480a0d502cce268a36f8c391e004feddb55191d8a","18cb3a3cec9716742d468fcd644048bb29e560faaf66f5394592987b180bd41a","f88cbece94520ba3bc0900105ee58932dc003673df918a964b761b8ac9da12ff","3c53e75bed49ba527c016e66f59995facf9d5bfae513484c03da13d4f99acff5","a75f1c241fb5d2a78355490d5f64a9f7a9869645ddab36da78c3a032038d1f9c","347fce49394b6141bb1e4fe1f1289224acc23f3bdd6d97d335d36fdd9058c275","2cb3d03c4fa647655f06857f3e55faacfb812f8dc7c257aa10761d43e9fbe12c","a77d6603ea315a1a40198ffcbd12dd2bb735b43c4a160be5cdd17c50135fe05a"]

Anchored

2026-10-14

Public log entry

search.sigstore.dev, log index 3248278454 · entry 108e9186e8c5677af67c…

Expected log hash

4dfbbd25ce402c4821f7e2d50b18e091e9a30465f45669967c545fb71910f358 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":"v1791948368672","kind":"published-quote","locale":"en","page":"brand:zasta","quote":"Zasta helped me a lot.","rating":4,"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

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 (81db1abd6b6e…), 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.