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.

“Fastmail has been around since 1999, so I totally expected kind of an outdated experience.”

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 3272274666

Proof data

Record hash (SHA-256)

3a4057c66a2173b165e129b56688bb6f21a123cb99996c732268b8a9697d324b

Signature (Ed25519, base64)

utnw/q2SuzTcZyxQ/rWazb/5Y6rDhsL43zjqfRVRe1g6p2oAovtRpnrsN0ILLGmjiK7KsKcvzoLII6j4MGpRDQ==

Merkle root

a4d47c2a34f6eeba31e2744fb1551fe9a0e34820dfc152f1ad93a68b24759c3a

Merkle path

["3a2ef0639751ece586fc7292c7c88992e5ce6e864e8878eed4b338aeb86e5ca6","a8335ad6b8202cc5c70965861d85a3d94f5bdc8117a5333e2d47edcf194b6ad6","b418d8326291a7266f4b6af30eef0f4b4b8a2668481ecedee88b07e9189445a8","ddc632dca62bd1ccd03cbdbf3abd4180ba9c0ea20d8cc298c736db3915685f8b","97e880fc2f6e41838a13740351da88006a035b8bfa31617fdf1ff5af91d1c399","87ae6b8e0d18d516d8d055e4520a169362ea06113bbd953f68f9b005da1cb51b","52fa99ff3cfa0932ce7325537afc25b8f73e1f16585abc332a4ff6286c5f0d2f","621e8412dd3fa5cd5d4eaa1200d3f43395b685f1ded5838d51a1eb534dc13273","30a2e5c204185b17f3f2acd8860ae57bcc30be491dc68fd014361c8d16d50290","ea169aeba317f4bfa07d1e583c5d023787b42f31ab973ab9df27cf77e23de7ef","0aadceef0f0d856f742d189406dbaa3aa5c755ebe9fec69552e8b54169d5a407","349e15569e0a1f4fe3a9d16d01f014e54bef7124bbf1f14bdc15063bbedc0e8a","0d7c4faad4992f205f2c1ebb2b0e4b1b7e9d070f1f77d3f8d64b80626c324f46","35108299fffbb5c1a0d86f074b5805457d73da5ec7c848a19bc9a928f6a42a99"]

Anchored

2026-10-16

Public log entry

search.sigstore.dev, log index 3272274666 · entry 108e9186e8c5677a2724…

Expected log hash

d56e71820b4c8c62b755e9f6e3d2b624566d12db6dd1606e99ef55749400c387 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":"v1792036997995","kind":"published-quote","locale":"en","page":"brand:fastmail","quote":"Fastmail has been around since 1999, so I totally expected kind of an outdated experience.","rating":5,"review_date":"2026-09-29","source":"Trustpilot","source_url":"https://www.trustpilot.com/reviews/6abb071eb7feb58620359c1d","v":1}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 (a4d47c2a34f6…), 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.