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 3162293789

Proof data

Record hash (SHA-256)

39e875db1d50477cacd1a2f4510a98367eaee83809ed472a55b33099302d3f5d

Signature (Ed25519, base64)

4idDWcc8FXovWyRYWjCZjAsoYlHJTXXkjrnBeeGopNNgMyF/P8rDdgHEVp9J/2InDOodtXrS6YSzBMBURftrBQ==

Merkle root

ab8d4de5853e13d360962f03dfb915842a42e1c5601cdaac4f2b37ad0ba96b78

Merkle path

["39e9fd419a30abc311c9ccae07a5c808bf73e196b252f936f3e2f660372863ed","dbda7ad346f474dcad9e4cbed2d61d19998ded338e67a98e3a8b95c506da2050","c57f184c2e8cff88f4a7fc7cccc17e1482211df5427021746342dcfb97398af4","912f10861534eed1f678add917eec0f2039c207a33f48a7ff5b8bfcef4bfe2a6","28975b44a388d2cc4550c1694225e69abee736c11fda06bd7710a4df0578d03a","5155ad4664eb43efa0212eb4f8354a3dc929434489d6b76c044ce3d9ece22333","48619a1fc6d846d0686f5e048cd1ce62241d8d61ac03ed308e960d4f40cd50e5","d765adbcca125f0fc42e25fadec6368d8f6c69ec42037abca08b7417c18c5485","b7ed357a2f861cfa4439fa0da15b1a7082c0bf3b24cdf3edd5532a4f203da6be","1103c0ab103b5b1382fddfc5ce479f2ba1e90fac5cf797b08905b48a31c8600c","694dade8b1c70cf6375187d8a50d78014918497c23b0bc8d629c1d68fec9267b","c211904b9171b5c272f5c1438c153a9b8b9a82a69b1c78717cb68f70f412c0fa","145b8339a2152137a5c533b9fee0b743027ca75044265351c444699ba891d42f","6b7938d0463f2b633e195d7021170023360849e40ff5e64ffe0633d28e084f81","90ac6c76618b09f3702b50a6410c80828bbcb4ead0d9d85dda294a654717f483"]

Anchored

2026-10-09

Public log entry

search.sigstore.dev, log index 3162293789 · entry 108e9186e8c5677af0ef…

Expected log hash

49c1b9c7cf9c0180248092c94f6cb48d5e59f6c65f471decaa61f120e90874ce 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":"v1791539611981","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 (ab8d4de5853e…), 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.