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.

“skips strokes on pen and eraser both”

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 2515144749

Proof data

Record hash (SHA-256)

7a87cdd9719c8289994a4dd8d192009387685af3ea14df4603d8ae6857e49bc6

Signature (Ed25519, base64)

SXY24R9ZT+ycSDFf5RqsFulL0ZuJ3nIWOyvhv1JNmnwRGxPAqgfM1onRiOLxrkRtzUBrJvseZlz3U7XerccYDQ==

Merkle root

8a6ad893af0f0bb6c448016a777af61f3f4935afd82df0db132e64f813535715

Merkle path

["7a878b91188aab057cc2ea5db3a5af0645b247ed242e0344127234f4b25f60e1","4372e7a376cc4185564aa4cf0318483cda28eca6257ca067c3adf7048a7fd211","c0dc283f2bed57e506eb6604d0e85f53b5b50cdbea880d79bbf095ae30345a34","0686c1876634e42c2fe69f2bec41385fc792162f9ae557385d7a29da9dbd50c4","52fd269e2e31d8d62ed7f215d07295cb4235b9dc3fe1fd7be3645eb0a33d3424","aa3065ad3dfcb8c87f295b5fe9bf28a2a30b68d401df7c4b3dfd43c2edbe77b0","2c8da347d2f9ca42f311c5e4b4138e64174ee8bc1eddbebfd67701fadf301021","6593d7db31a5e5a8514cc46d4f63bc01735598084bd6675d8bef25b1bb6474fc","9faeabdbf3d655bc785e09a744b5aa580b996ddd716fd3faf167d019959d33b7","67cb30aa5d8012c8ea9df539ba96278359b800e631eab2a92dfe28c0508781e1","ddfc662d7a710cd09b89d3ff4aa9d006161e2017822e9496291323eb001ce42a","73f1a430980a35bacc0025104e62589b7f6711bf08b3ba132110caa28e1df671","5284fa1b0195183d338070f05d29e0d94229e3402263e30318e4f273240fdf18","95de144e054f717eac0f186a52d131e0ff4674147622cce8cff3d2611e7b6e99","8834edd87c11ce9424175f1744f71345038aee1c5b6f350a6f7bc2a49b63e8e9"]

Anchored

2026-08-19

Public log entry

search.sigstore.dev, log index 2515144749 · entry 108e9186e8c5677a63b7…

Expected log hash

b6b79ad662332330e69c4ef135f6fb13ddc70048f846024d496aaa533f7f7fc0 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":"v1787137589246","kind":"published-quote","locale":"en","page":"theme:xodo/fit/en","quote":"skips strokes on pen and eraser both","rating":2,"review_date":"2026-02-27","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 (8a6ad893af0f…), 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.