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.

“this app is so 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 2543266411

Proof data

Record hash (SHA-256)

fc2d278f43bd5bab4dc6a5a0aca3dd49a0f6dc7cb995e943f307749a63e6b7cf

Signature (Ed25519, base64)

tCocvchobWUKxP8l4gSXT8WO0YEpILU44VuZ1Z7IxNRjq0ozRRv0q+MSeVTEi70fQnpzOs9xfHyUwZ/9jlI3Bw==

Merkle root

8ffad6e97d1457610bec7a891f189d1ba7dd7a92ca672c69ff1ce3283acb4b5c

Merkle path

["fc2cd4d21cbcbf2157c6052a165fadfae3ac096ac60f034802aa3aaa2301cf3e","f32f7cb13a19f3c6fdaad98742a71af1dc48a22515a897bf7e80b30fd20e9237","59a611f7cccdce1ba2fe9cd771fc690866f6cb410d77e09e94a2f8431b651edb","898b42c8052b66be9b00c1bc9a6a341e67783e99f19c0fbbde8673290178dcd9","97e83d1d2edec1f846306de80c674736335a728d48439c1948d85b6026f6437c","d9bc9455ad7ab450b7e1e00c9e9301952f864ddc785a5e2a8f3ae0318808fc00","b8a71a8301ef69daa035a8146d2b420a52a41bfa61bc40cfe99397cbd622c075","826341f92a351827d9cd7e4ab5c69b18d5309f060b2e9bcca5fb93f3e423b1f5","f69dba89345c085265d7f0bfdb1634310008a13aa262a7b8ff400871bdc85851","df08cddd70f2448ba30e29d235ea68104f5c2f6976a4325a0ded101da9a6bcba","55cc2043e83be6a2b4799cb70c4f258ae16af88ec89df776812174e82dbb32df","7c94ff27d324cfeabd6b92fbe8fbca077bdf14d29975169a3a05e610d1bed13b"]

Anchored

2026-08-21

Public log entry

search.sigstore.dev, log index 2543266411 · entry 108e9186e8c5677a241f…

Expected log hash

443ef8f29d5167ebb4c56a46778facd07b7651afa8db2d089c14a991ce0d04db 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":"v1787284817344","kind":"published-quote","locale":"en","page":"brand:zettle","quote":"this app is so easy to use","rating":5,"review_date":"2026-08-11","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.izettle.android","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 (8ffad6e97d14…), 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.