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.

“scrambled my pdf into complete nonsense”

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 2543025731

Proof data

Record hash (SHA-256)

089642470d5f21df05a306a01b79bd7b0556c42e8c90563b95b137e5c8ace1d5

Signature (Ed25519, base64)

z2h2Zxq1z9gMrNYbL4zLv8ZpOtrT+O6/U2CV0eP+DnofJvreFanGiL3d1b4pUFVrZ5Zb3dzBSiUVDjvs2MALDw==

Merkle root

172a3e0b3c9f8b02f52318e01ba6beb899404e00e91c15eebc4dea38467e1404

Merkle path

["089317e3a8bba4e46096d180230a9f16d07fade1e0ab45c2cf4443146c2eaa39","0331c541dcedad32b37563627b203fab4c12298ba82070d0b90b0c682851ba9e","3aec6596c501cee9992db9c11bd4d7b986c6ee5852c4b7e5a1ab6bd1c184585b","8ccbeb50c50711d7443033a7a9041abd5e23b8c5b9d4ac028427c405af33b0f7","ca608ff3daa6c18b687086eefd8083700ff5473192f0568d81e3aa2d58ded0ad","c37d66aca036bddc97474db0e62895553737a8307c325bde10fd749eed9aec89","9bbed06f147b406d1ebe3c2c7617675271e9c2fa6140c00ed35f8a63b44f88dd","e5043092a54bd143cb978cce1399aae34d0f97f97e61dbc5b4e4bdea0bf078f9","5b7c778d98379cdb89e3d51ad313cc9932f605326fd0c777d5a6e27d479bac92","b9fb6f907e863ee86ec99759e6ce11028b6c1a70f6926c06327b0b7e24b19b5d","18b1697dbe6f1a1fc231cabdf676b92294936210496485c96a31d2e33e066f4f","589c22da96e3ff60efb0f79f96ffe7af6214e9470898a7edd786e91a2a5cbbad","6582b4bd72409a5334905e80c9e3aeb7c43a20c5eb4c139595bd990bb777102a","b2e250a62b44b0b9c303f91afd3aac8852fa6af504d7d68ed736141a3dd71161","7731d0ded4f51d151ea3e84474d1e27a6279e8756420c93cf5fec0abf7f11add"]

Anchored

2026-08-21

Public log entry

search.sigstore.dev, log index 2543025731 · entry 108e9186e8c5677a8971…

Expected log hash

19ecbe4a66d8adbd7c6057dbf6ed9be73485c248dba1e0c595279a908b3e8bea 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":"v1787283443958","kind":"published-quote","locale":"en","page":"theme:smallpdf/quality/en","quote":"scrambled my pdf into complete nonsense","rating":1,"review_date":"2026-07-31","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.smallpdf.app.android","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 (172a3e0b3c9f…), 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.