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.

“sollte ich immer mit Wasserzeichen eine Kopie anfertigen”

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 3139760477

Proof data

Record hash (SHA-256)

163a558cd7280edea9222016c4e943a71570271b933997bd40a97e30a539686f

Signature (Ed25519, base64)

pPBnHoLQ5jyvRmb1jCexILDOX4Qo33mlKs9M8UO9Q7RaRRcZFFZR2hZKI1QbS9VCHfjko4ML+uHY6LQOsyctBA==

Merkle root

49133e6803d24035baa1544a5c730db93dbaf832df48f680ca855944337404a2

Merkle path

["163a71318f0211470603d5678e7530905ec90b65d7766ba605e13e2835d33b7a","0649082a9cd88d219b326b0ab9825712ad8edef838f4053c051278a9c93a8256","2bcf9a9b0e32481b15716ce663f4ef9e5eeb5d7f127262f4de0371e5042733c5","ec3224938eba1b64205cb8ca0b30b293456afecf3aa01c5d053777e1a2ec3347","069731e77d167fa9186b92a4b7fec7707ba0121ee4ca3c0ce73fe480f67f4cdd","3d50d7772d863214b77c8bc054f8b5389c2774d36fe2019d1823b10780a4bd11","f934f3495cbe3f89ecaf7fe18500d3baa13f591ca554665a709abc17bb0a132b","751c348dd9fb1bd74241802674f05283f48f95780da2dc111ae27ef33a501240","a098ecfa1df5427e24111761ed5f88f667cf74fe5e1393ea946ca0572364225b","8dfd77115b0495e980b2949693f7847e0fca4bfd6341ff0ce7ff03ba0b50f467","f43a48814519a5e407bc171cac612c59b3046f06facc1e52316ed32eb782a411","1cacba8ded6d3fe4021b99b9ea0c9858548477a47eb1dfa6995591887eea7442","da05ecf7377d5697c026f830a74de1a09359f7b60612fb722c789caa15cbbf29","90889d6ebe241f2d2f9092870d002ba795f7d27137f7582a09b4369ab1517327","d81f506ca96dea712a8b56759200b270fc625cf496d323ded3475eaafeb2d916"]

Anchored

2026-10-08

Public log entry

search.sigstore.dev, log index 3139760477 · entry 108e9186e8c5677ac88a…

Expected log hash

d54b6e5e20903e9be29e6a5973227ee9b3dbe61bdc0fa6481a5788472cd5976c 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":"v1791428432986","kind":"published-quote","locale":"de","page":"brand:xodo","quote":"sollte ich immer mit Wasserzeichen eine Kopie anfertigen","rating":2,"review_date":"2026-07-31","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.xodo.pdf.reader","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 (49133e6803d2…), 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.