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.

“Seit 2022 gebe ich meine Steuererklärung über Zasta ab”
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 3258071454

Proof data

Record hash (SHA-256): 41fa56a5452ca1ef26addeba723959aca9151a6e83919b69ef6074688a5e553b
Signature (Ed25519, base64): 5+ObrwOcDXIRYv25NdQcaZAZYLTr/7L3QqK1mb7ofez7frI3F2/YjHP8DoEBHpi+MSx1hka+UZ8WDLjkO6AEBg==
Merkle root: 3286418fc06d25de584969d1d1d5f4b079918bf6b5a5178364cae8b78bb351b2
Merkle path: ["41f73784f2ca49746c86d54de0e69bdba4ed8a78b931b426693aadb8ad891d36","c62d35068e6cfdab088368fd37739c6cd88d9c11f188e8d65b7f5250cde87c63","a8f6ea2ae37c08031261f47a9dc6438aed3e7f4f305416ec368f3a012735abc3","76724ca68cebfd4d2d3555bb57e49676c2a639f35648ce5d69bb4a5d034e11be","330236d0e461b0f5a98e2ddd66fefe857b44dad494a8eefbc664e3736f5c4fba","8a72149dcd482c44d887b201036ddac0f89975307467e51e0eeeee82494f23ef","12d45468291e2f455b35ddd0ac5085e52cea540036567e6c1a66ca9f35e8a1b8","4489566acfd62fccf9a204a2bf3bfd04f1f82248bc421912177b9cbfbc192399","8c909a65d3111c8ecf68e574d23adbd5e8e86d00759d6e8a269d4a22bae4397f","f277c357fa613e48e1a39d1fdbd31f13c57b0edcc00b52cc4af745e2912e25d0","fbf0beecd3644a0b1ed85afe1d822ac72eb6c6fefbbb832dbc0449418be397e1","18f743e4293ac0f418bd2370e18523fb86a3c1df20723b156051657b751cdb54","d9800b1b87d047478eeb89f8a1dda19593d3b273c40fa6d591a1b944763f5e83","b4d8773b8032d1dec9dc6fa4ba1d52baf4d9efac6a7cb542ab0617b855dc5284"]
Anchored: 2026-10-15
Public log entry: search.sigstore.dev, log index 3258071454 · entry 108e9186e8c5677ae2ee…
Expected log hash: f9026b3bdc4a2e986a01140b2370b0ce9ec3e7c9353055dd7c9909c6a9941809 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":"v1792030101458","kind":"published-quote","locale":"de","page":"brand:zasta","quote":"Seit 2022 gebe ich meine Steuererklärung über Zasta ab","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 (3286418fc06d…), 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.