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.

“everything was fine and now all annotations are just gone”

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 2542879916

Proof data

Record hash (SHA-256)

56137e4458907a09215f9638a67340ff6cfb346772c1858f72249001a14e5574

Signature (Ed25519, base64)

U0avH/9X9uNXk8BXcWf+7BRAUoPKTVjRNW1eTvERGQ5YzmGHrREbrOBafNUaiXFwzkEKE/9VizaMcWKlAg3PCw==

Merkle root

681242bb8cfa94d3b60cc06de1bbe3e5e124dc1675276b11df0aaabc9faee58c

Merkle path

["5610f8dad2d0a232030de25246437f5843d4faeb9aa456e85e31a745e3e85375","5992b545ba8ebbea230fe5efaab9d9c7776123cdfd2785f5f2014c6bac6b7f85","f863e50dca697bc2ecd427aec6f121af7341acbbbaaaf7510f95b3fb01a61c18","eaa185956ba1836c44963ee2352c9ddc6aef044b9cf058998a6dbe2b9b38e618","5cb40844dfc518074598079f0baf821ace149c7644c6066845b583abd28a74d0","2b9749f57e9c06f8c414c5db054f15c35d3a0a118a6074c7089a210e1beac2b5","e61e4c896239c0729ea55fc015fcc9d8f78e20497e512ca0d7eae425d2855db8","6717cb3d5493f168a2b9c474070a2851173bbe36adc92f508e29c9634ff3b0a6","205b24e07ec009ba68604d59d3d03c35d2bd6db1f99cf130801c085dd49188e8","489b5480544adc74f7594d743fd0b9da3e2dfadb39b8967aac3934429c6af933","e9a6998f64f7b3d0001a4bf98af40c68b2a853219e0332ec78e6bd964e07c2dd","130e56dc0be4f0d6a22430c0d78a392d35eb8f7eaf006ec8da1b5a08e3bd3806","ca35c0fb2a839613499bd489c6b0c2aaacd771cea479126a5506cbbc9ba09ce1","018848b1e64bb342ebfcf3461012f852a9938ad88239203d89ee764353ea1567","78eca2193b177c5ad7546ff5d365dd6cb79efa278dddff5151740888f319c0e5"]

Anchored

2026-08-21

Public log entry

search.sigstore.dev, log index 2542879916 · entry 108e9186e8c5677a2329…

Expected log hash

8337812f20bf1207a3c96eed87ab975d7e92ac1421dcded24507b32e456b788f 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":"v1787282728402","kind":"published-quote","locale":"en","page":"theme:xodo/durability/en","quote":"everything was fine and now all annotations are just gone","rating":2,"review_date":"2026-03-28","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 (681242bb8cfa…), 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.