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.

“you can only save with a watermark”

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 3163461995

Proof data

Record hash (SHA-256)

1d5ba4dc1c4bf1db710cf8a125327a1f6675980ef1109af2a118257531ce6ce0

Signature (Ed25519, base64)

hvID7Sp/1x6R9Etl3B4FDS8w36jJqg1rx8iwQ9Y7UAjUJlIZ4fNHWjMVnmlt245AG5ft6Ug8dZ2uI4C34QtJCA==

Merkle root

f2dea3193623a59d18b4d230cf1484689c024b05d34648a4bedfef78c47360d2

Merkle path

["1d598ff9fd7eb9401576448ac56a0599665c9f4c21c203b6fa9b8a3b4767a8cf","cf98a16fe310165bb9296ad50b8d547224f04263b3cb44b21d4a3bf05e250521","717a7c1f49ac655127f1107a6eeefa75ce243465aff354483d999d1a60c333c5","c698f4c79bef599b12d0f040472e9b75145304ccfe88a4c61af2745c2d971c98","64b4434f7d1d538f99e2a80b981f301ef538841ec6a4055d1ecb25810dcb2faa","b5c880821148232c08a62da723f6a3f8c2488f9da745c4185fa10e706f0ca699","158ec2d0a6491badf3b4a762e942deea4de5afe4a298fedec937f4561056c66e","ad0494e4aadb961d2b10ff2e2203ec72d542080e9ac0813b1c7daa3e44e7e29a","2083e37e088406f04db7aa76a46627978011cbf1014f798231a92bcb457cd7a9","42e5de607cebf94670546e69de1702fd1f27fbfcdef470ac1340d03eddaef88f","bcbc47805ee6a1e76081b9860459f94f0a031ad06015d48ed809ade112f8ba2c","ca914761c020d6d4c41f330c4764f3390122af15302d295f2d6dafc486124bde","665774a1192b73721b453ccc4135f39652e90d0c548e0465aa1a009bf210f3d7","c3040d35b4a41a3d91fd7f6d8e1e6868620c896bd0ae8d09b1351d70693bef08","658fda4333b0a975ae51c0ef52c37c157029d897878579fb5ff3ac48198b1bf3"]

Anchored

2026-10-09

Public log entry

search.sigstore.dev, log index 3163461995 · entry 108e9186e8c5677acea0…

Expected log hash

1e385e1035f15f3dbe860bb8f3e4e850b8c2ce2b31edb58c97be626995a4adf2 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":"v1791544610158","kind":"published-quote","locale":"de","page":"brand:xodo","quote":"you can only save with a watermark","rating":1,"review_date":"2026-09-29","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 (f2dea3193623…), 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.