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.

“one of the best app for studying”

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 2514654467

Proof data

Record hash (SHA-256)

68b26ce9980ac7a561b72286e476ba264bd99a37e7fd35deceefbb3cb6871576

Signature (Ed25519, base64)

8rug8djAOfCWFdPaZbJLUw8+EtgqtJIe+3eY/HeDEM/MGmEU+JY25OyRXuAWAH3HtfwQEE4nhNb9qI7w+9zVAg==

Merkle root

2030d4ef17fc68fad1320305cf569e85a00baea931fba0d3ebe628cf9c90c35f

Merkle path

["68b1abcc48495a41785b2686810472494fd8267e1fb28ad0d2f583b08dff943e","7da66c16b6b68e85ad42cf01806a301468edfbb6bcb82d69e81085e9b303cb8e","30f7688a06d10a2952f0fa855a6b32c948102a8c2d2535489c1c900191f2c2fa","41cf53c2f881cb13897404ca881207ed5d4e325fff2f205c5c2965a7b3e0e4a7","9c0d18a0f78046041f3013dafffe7e1963d1909fc0b426565429bc4778e5ce60","ed5ee0038729f755d5f817ade085eb5b28c11c20cbe39b26d25914de7f16cd73","68f1a4614a65f7732f29c7ed28c44b2e9bb7c0160ca2ecd32884f755f21da328","60cb1e83af56ceca1921ebb9b23cc777e8f4845c9952aa95685a530bc664ac8c","b461d64923c63cb136fcd37bb506fad5d3550d2dc330603be246ececbbafcdee","6bf7a98e89421f47d7ebb9db5775d3c526c2458198d4f5e8be07227abed4962a","9ac7e8cd1087d31d05625119b520b1ef853f26da43148686f30e3d8acbd6a3b1","b5e26d43533a4d1b34d97519818e82aacb7ada756d4442b9f6734aea12f7f6bf","5e71e1e70b37a69afdfa58b6c1794925a5ef525370674594f74ea1403dc0aaab","22c95139cfdc78a2baa7a8e247bcf81329645beab990fc5e095abcbd46515e64","e362b663c2c1f5a93380a04a7aa41b42f4bafc7f870e85cf63803f76c744c486"]

Anchored

2026-08-19

Public log entry

search.sigstore.dev, log index 2514654467 · entry 108e9186e8c5677a9253…

Expected log hash

ddd8d6dfa3771a4106292f7bec674337dc9649465b28b118bb17bfc2b8ff0a67 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":"v1787132872903","kind":"published-quote","locale":"en","page":"theme:xodo/quality/en","quote":"one of the best app for studying","rating":5,"review_date":"2026-08-07","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 (2030d4ef17fc…), 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.