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.”

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)

1c613f123fbbc9fd92c8a8a589f67b3eea4167493c42b3470b65d594ece02753

Signature (Ed25519, base64)

tcT+DLt07bNfLKFM97hlCUCm6rhXqkQqpl6wtnzTfVpZa7aLeg1OCS8lr/2k95uf06XajQIkRc8Jw5R59DokAw==

Merkle root

81db1abd6b6e636da393518bb64e907fa9c48581b44ac2be5a9e74d02608e451

Merkle path

["1c5eb93cdfa344cb594c79cb718741f604e8020cff47d567e896aa51ca024d04","48d9eb65882b3c9b24109c53c88d8a8875e6de70c3b4e476cfa4ce528e28ea50","90382f692a533240dbf17181173e963691664698985f63322feb448c4e2dbf5f","62ac7b1105380a0bf61903ef46fe1899aed93ad8ecb3c98ce6090b622519f1dd","35a3889812ffea66c94a81c7f4e5e0755efc8a375ffd3db28ef912c0e1e09247","46254a101004b10d4890b30b2b7c321e32e522bd344393d622a3ffd6503e275d","16b4846e655770208138667a9c7563875c6b3ed79870e1170c01912f4becc699","93aa67dee27f3312a9884a2520bdfffe30d803e6d136c4a6af467d79c5c181df","16dc6cc1cffb97b8761419de342feed8300d01975ca4bac20a0e16c428ba681c","7555ca7755ce0977aa97344e9edea28c77141a78774910cf9dd1ec7f5be52ddf","f0d849fe2b2b2e8ac46eb31ce8ef0940645609e0ab080116168fd866668ba7ee","0f8ab31a8b7f9aa6ba4ff019c72fbe9792e5837d40b3bad40ea1cfb0cc79e40a","4fd1b36929337d346b3723be273df6d7588bc7b080f058260d538b3f309857bd","6fa310e475466f0115dd6b7ba199f23e915f2a513e2610274356ac5bd367e940"]

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":"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

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.