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.

“a subscription of €13 per month for occasional use is exorbitant”

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)

112604d106bb8e94a564573977b4749746c655ef65f66bd5f7e6356252e60bbd

Signature (Ed25519, base64)

27hiwuPk0D8Duqrnmz8xvkWanT8FEboWeh4TUi38R6lxgxEh2srkQPaRCiqDE78kbZwOyJBWoNZFUy7tlmPgCA==

Merkle root

49133e6803d24035baa1544a5c730db93dbaf832df48f680ca855944337404a2

Merkle path

["11262b7624f765656421ef6dd11336d487734d25635bd9cad606c6a915553306","0dfd687de26c36d8fa04fbffa148fa4a09da02d8c3c7a92a06c54f9234bc923f","e37439ce984a90eec7e9c306d1516a4dfaa9aa6ea05459f5fdf5d098edb49f3b","50ab9e1c5b9b68b835f3cda344c7188bd4c54cd994579331f5232e5be37cd288","a5e6f7793b3f579987079682b3254bc7504594e2db1282f8f24d49c48bfe1ab8","edfc5fcd739010e3cc7f6cd3c0d2e7f911360c13638db6a612a849531d4987ff","c5ad563057d46ff1b479573fb9e66dab08f53de415d5d7c7eb2442c7f71197ae","6a71fb1f279d2f9735de680750edf6bfa2b78ee64f15b28952002b31d7f90195","558ebaf418ad5a1b413188944ff56fcaa8bd137b9cfc2b09991ec8fce18d2148","f3e28120b62274a21c2155c45c46efcf8c148418c375d300e9ab3189478fba80","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":"a subscription of €13 per month for occasional use is exorbitant","rating":1,"review_date":"2026-05-12","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.