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.

“I contacted Surfshark customer support today regarding my subscription renewal”

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)

84a282cde09db974a207bf06c3f1cf87879de4074a770eb6c12199b7830b68db

Signature (Ed25519, base64)

l3VJFufrEps7ualb+PMX+Z31ElxM/pASbEKwA2XucNGqvIt8itUri+4tXU0iMQuETus1Vv+WPiYWSrH2qlgcCg==

Merkle root

4dc0bd79ba3e9442f7f1feb21f347e2f6fdbc72e99098aa5164776a6202654a8

Merkle path

["84a38bb6d698f5ac0f85b2ee0ddb1c3ff98f501954f4ba98e063ca1a2b71c6d6","ce2de0728ae744feaab5af6406e517e0e8f8fc550974a7c99057975838a7cb85","0c28921bd6c05d8d6aed9385669faa66d5da2f8da12e11f89090cc4033aaa8b4","77a663e9ee92ddbc0a8490547182fe05b8319572403c307eb3e41e06224d8f71","11183102eaaf7bee0f9a1d46f86b9f12c4fcc5324eab2d02e4235fa345eb55e0","292c623df74e94d01fc5f06bf2e42ff0020729b916acb60f271b02aca26d67ce","7d30e2f5a9e46dbfe043b3da536274d8f2ef269c262122679c0ee56ad5080e7a","4643322a049420882b2223554d3736e5c58376018cabbc6e0f5995ac6c897d43","cf1980463ca1a7a501f1023a8af85a01c088dfbcaff5fd6f96db7773a6bf7d61","c1db4e0744ced9b74ff52381d032dd6cdce9fe85aa33c91edff0945cb634a644","b61a542d740f656beb42322ec68236b9e6629de7bf1013c4f1581ec4ad98bebd","d26424069f8ebada7d5db61084db1487cb6a3d9e3a9d7dea65c859d46af6bbd0","e3a1de018ae2658686c8ef0556fbf43b0147585a01189da83c1927e13f8542e0","d3f9820ef177ffb6742d93ecece273e46037aa87afa8ee19fc7a0b34f6ac592a","e60c2274998b06992577796b6abe86bec144203fe960878f7951a3ae12c9e532"]

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":"I contacted Surfshark customer support today regarding my subscription renewal","rating":5,"review_date":"2026-09-04","source":"Trustpilot","source_url":"https://www.trustpilot.com/reviews/6a9a44b0bc9a765e41bab073","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.