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.

“Their security advisory e-mail not only told me exactly what the problem was I was having,”

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 3220367991

Proof data

Record hash (SHA-256)

4ff5e58873612e260d7e021a1275f16dd9eb2b9b9ad8086c711905eb907902b1

Signature (Ed25519, base64)

laPXqFUXHmCXdWj+7NK+YOzlqtR5aZq/IR4fbSU/PXxM6nyQoaqS3vx48aTsxQb9ctRQkeb5JoEfzgQUi1TkBA==

Merkle root

8e481f891fa4a8f9e77c0279ca152fab4383b65a50decc840d9fd7569bdfbaa3

Merkle path

["4ff243a3a8ee6a1180877d2c0b4a1cf6231d01e49e05eaea3fbc757615c2fd84","96bf75d6d3e36e3bec7bd6f993f77e60170d99c941aa2afbd7e9d411dcae6ed2","d0c0a070b6cdfbe364d79c40742311c0540e928982381b64958943731fef1047","4f373f5285606bb45e11b7de62521533ed5bef0e3269c2950202652cb62dc8b5","cbdb0947647ba6416525210e2ef5baa1f4854acb5b35ba50e1cbefbca1d835ff","a3331029038ecb9bca08432b4aa0ba4bc20b0bdfa9e525c6ee3b258e8cb03777","5b72a083ea78d76e3cc483cbacc79969dd3ff4d139f5cd215b01b65abe370fcd","e99cfe13fbb2d14ed4fbf089b3e15f30e7192308901ffdeaff1cedce0afe59a8","ce19dd1e9c5dc10d5a9d7ee3cdd58f53a163f9cb0e342a7b09d2cb20295b9322","4534f74f7ea74231e7e4a7114d1b60e122b252d33b1ce6d93bca340305b1c2c5","b0d19eb198ae92cef79ff7b06a3ab9a6d60fdb5502f9f4962c90f48d23c66b88","3b4f21b826cbea2d43ed04a02447fd6a5c5177bac5ab8f0646d2865e69ab2bc2","a8a51e6cf51feca9c73f59ef001af57f41b1cec2b5f25963206b5df2878ba531","391099ea13ca712ab4d3c0ebed9ae37f021122ce33d031a4f3442fcba2038ec0"]

Anchored

2026-10-12

Public log entry

search.sigstore.dev, log index 3220367991 · entry 108e9186e8c5677a60ce…

Expected log hash

9a2b3ddad9c3b29dc171a15554fc81f3d4710c01a7565bd2f28b92e7b639f6dd 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":"v1791776812348","kind":"published-quote","locale":"en","page":"brand:fastmail","quote":"Their security advisory e-mail not only told me exactly what the problem was I was having,","rating":5,"review_date":"2025-11-08","source":"Trustpilot","source_url":"https://www.trustpilot.com/reviews/690f4fb435a243acfec56a29","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 (8e481f891fa4…), 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.