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.

“Mr. Gregorio helps me to change my primary email address”

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 2776103867

Proof data

Record hash (SHA-256)

ff215569f61a9a2e10e59b1e1763cbfedd1066c9a7584c5103e3f178c9543773

Signature (Ed25519, base64)

da3IWbiJraF0qPCyScJQhL4/NRsCM+sTNwGQlacucdkLB4MANv/wJB3O6rQOf+Cy9ua8dPpjKP2tOvfHFWPdCA==

Merkle root

4dc0bd79ba3e9442f7f1feb21f347e2f6fdbc72e99098aa5164776a6202654a8

Merkle path

["ff232b5d4f9d8f7c295a61a64b31f7bba04c4c4bd721fb86f1716351e26613b8","cd2ae310f81f6a33b8eeb2c35540e68cb759afd42f04516f199b0ffee921e303","6a540b078cdba76ac1d48394657da5803a33f4732973f954760fef84378214f8","5d63905ba85e5a8aeefbc7216fd797842141382e7eb508d73e7465d33cc2e188","ee25059afd2a666ddfe51cb26ce26ea81ec445f8825f7adac36cdbd32a1ded2e","02284f9818ee1de54b193caeb8bfeb7509b5c2802e3dd0bc537a123668e44e10","c2759c3f3f23fa22185901572ba460d728db3dd940245d29dc27ea1cad489cf2","c683d0eb78952b3f018ffe2643455fcff37341bc29e8922ef6ae94fa3bf00871","6cfe24205163e82713745872bf57a9dc0581e84dbaa8b90e202a874aef1f278f","66f93059eee3676095d6925b7cc2fe3b97c348e816a4d3ce47c4b00902d3a227"]

Anchored

2026-09-10

Public log entry

search.sigstore.dev, log index 2776103867 · entry 108e9186e8c5677acd4f…

Expected log hash

2498329b7eaf275d309293dfbac35d05dfb8a55c65956add8448561c05945f28 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":"v1788848066028","kind":"published-quote","locale":"en","page":"theme:surfshark/service/en","quote":"Mr. Gregorio helps me to change my primary email address","rating":5,"review_date":"2026-09-04","source":"Trustpilot","source_url":"https://www.trustpilot.com/reviews/6a9b04295bfc6b42054c4794","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 (4dc0bd79ba3e…), 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.