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 have been filing my tax return via Zasta since 2022.”
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 3258859570

Proof data

Record hash (SHA-256): 4a51435a7acdd18617bce648d7b62965023a4c2a9ed8d64416c60d225b588997
Signature (Ed25519, base64): UmZ0sJO45Aq8VGzQSEKg9FIT32MeaB5KcghRxLUo5iDrCENzLS/qGYrnrZyN87JE/uvIgTCh6ffl2Mijp/qZDw==
Merkle root: ca3049e83faa90e23a8ee728d82960c74b9da8080000e4c92979853b767b75e4
Merkle path: ["4a5170afde08230f1b58155f2956171c318823f98bde6833d13b07bab725d309","058a3c6af0c759d4bccfa0d4f5a2107aae413bc8191f0e59018bf798b10cdaf7","f5ba719eb5e25f783267aca2036a0d1ca38b485747f0224694684cffc2be23b4","cf186a085a27953d083d7604141e4589c84cffaeb6baa8f8ced5e5135005f24e","df720222ab3cab6ff6eb073c9bf6e397aa0ac6f848874e92f6094d33670cb3e0","0d64b342720cae470f14c6c63fb928236ab617ec0150c52c5c915ef7be75fb99","c475ccb6a2d934a8343d553e60421916456ea72b6065cb5e1c71a2b475999f10","4faf69372c152029ecb5b2335d01775964fa676462ed4c98a81daa17d9e9fbff","5543710a5ba454ba0d4358f44635c7ecd9edb6074453d7168917ddc3824a5ae2","081c15b94f312ca11cad54d3754067f377a4acf0504128999666b141b6c529a1","5d913e33d19a3986260438930448a30c776666d91c05c786a45beb42379944ec","35160e899989ab55b338117e263269e5952feebe8ff14148b9712ce076e959e6","3eed51977edad6c2579b7e509587049321fa77487298d3b73535214036c0118d","7614ef067de1e21e5c4ed10ec802ff07f79b9dfb75186edc1d9abf343905b9c9"]
Anchored: 2026-10-15
Public log entry: search.sigstore.dev, log index 3258859570 · entry 108e9186e8c5677a8fb5…
Expected log hash: 37382a24206a9b79ef105a983cf477ccafc4b4430b1549876c44fbf5fedaafa5 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":"v1792034893828","kind":"published-quote","locale":"en","page":"brand:zasta","quote":"I have been filing my tax return via Zasta since 2022.","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 (ca3049e83faa…), 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.