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.

“hat mir sehr schnell meine Steuererklärung ausgefüllt”

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 2948162176

Proof data

Record hash (SHA-256)

4a562e36c603310c2657e92e30487e259c2bb41e66dc141d1af044cc416f288d

Signature (Ed25519, base64)

oBRYojTaadYCrib3a0yv5E8m++T2/uiGxVPhHt4BXYr9Jng3tfNKBQbnhEItD68ragt1f/l5QIqJ3wuBoSvPCw==

Merkle root

5397210619679ac63434abd334c13f5aaccbd1dd184ad9d8cac5ebeceaa346bd

Merkle path

["4a558f40f77a36c64903463dc80862562974214f5d0a36718e4e05cd53c03594","02ac97612345f6bf4451372a9b2e36456068073d83ce514db50667c12d7510ab","c586df36b614d6cf85a0f2b10b8d005aff582efc8b6717abd1fc6b8ff7422267","6894f48061b904bfe7fb5f51a1cba08d2d15aff7d3947fbad9f3dcff85ffacf4","d0db4b233e0656965408ac5847ddb5af56307b7b5ec92c94825874afd1476b15","184d19768bdf0de1aa2b94e5bcc395de08b70b6516c083e1ce2a40696f79ac17","681fa3bdc2945769667bb7910f335ae2383caa18e4b6850cbef7ab779ca652f6","fe74aeda7e5bf146d54cc7975f61b5a499bdeed5c1a135ba4070f5e705320e67","04d688178a8c44f3205eac0d7528183a116a7d1336f7a5389288575908799787","4925af5ec565bbffbe03c15a01eba87d8d4e05ca56f77aa0952d6ac42157133f","90744b84a252d7e51d67bfefdb583359ddb1de8204f826c2012e228fb935f6b4","761d3c69791efc32a160ff138bddbddc7bae13863915424c916d5f32aac8cb96","63caf53777d803af92ac6db2d445588376da791f63be3d8e14916e9cc99957cd","f5d1cbec3469173c409764ba850b613628c88020363ace8f472e6f611d605e0c","eb97a4ce74ce5f5fa16f1703481b35cd770316cd3d34167e9b76f4403804f896"]

Anchored

2026-09-25

Public log entry

search.sigstore.dev, log index 2948162176 · entry 108e9186e8c5677a61d4…

Expected log hash

5ff8f25b7934b5d72d363d6805344624efba4d637f2c851f11783b259b9d81be 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":"v1790226990092","kind":"published-quote","locale":"de","page":"theme:zasta/service/de","quote":"hat mir sehr schnell meine Steuererklärung ausgefüllt","rating":5,"review_date":"2026-09-19","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 (539721061967…), 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.