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.

“Protonmail hat mir schon genug Kopfschmerzen bereitet.”

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 2541942774

Proof data

Record hash (SHA-256)

085c3b1727755319567fa7a42c98e7fd3f0546f041e113a311c472c1444ec282

Signature (Ed25519, base64)

Bex+3FlXq58XrFLa4r8tkra8b8YctwL5ux25KmkJV1gyctDgyCXNUt0Knd5AU+SXWiHPJGM2NfPBuR8yoKoXAg==

Merkle root

0fdf8a945cf322eba60395065bdb38bb3eeb32c52e065b6c93c48bb56aa3bb91

Merkle path

["085a07f22e65ad3fcdacf90efc73a553f9a61f4a82fb63a9d98cbc3d9fb88aab","ff5de979bcb5bc1af1bf873417c6473ed64af70e2c1cb78c32066a9218df45e4","8e9bebcf2bb21f5d3050ecee9649350dbed4c3e585f2cc5c0ed7a13905138bc3","8fc78703898ae9ee74ae375e401317d6ed0eb2a7b482c908437d306efab260c0","77a3cde5ae9b00a57d3b7ef4beb513f3d6371daf478ab0a7c94749efbe11159f","f113d1c4776fd8772955a4d1fa1b77f158c929f0f7480406a6535fe2f3b92be3","70781374560679290695a70ad2eaabb9d7eaff156a3652e9cb9ece7a1b6d3c94","af6f1fca9d6b76f1e04cf7a55166712d981582423e383c4d05575739d08fdc85","b8ecced71384cfdcec33eae75721dd5d0a2bffa2cf44c93687941d01d68da10f","ca36924d635d9e622c3c0775c6c607305af315daada86156e1204bd0c6916a93","d14ec2c916170d43b8192259828c5ed27b4a658bdd363b23e1f7df0145410d23","6d29e33e5fefb46385c255036c778f7012c15e8953e15d2c708456fe3e94ce75","193dd7819b5cc0893cd3620ab02042348a20821938045af5a341e160ec2e8bda","d97c31a576cd351fb66ddffaddfc87228fbf93ecf06301d5b8aec9b37e0fda68","31e60baa9fb8f672f686fd126d7dc82498bbfeaa38bc676e67691bf1c2c7c210"]

Anchored

2026-08-21

Public log entry

search.sigstore.dev, log index 2541942774 · entry 108e9186e8c5677ae0bd…

Expected log hash

4825ba618d3c3368179be13912e101812df871de37f30b1ec256ca6d987713ec 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":"v1787277864570","kind":"published-quote","locale":"de","page":"product:proton/proton-mail/de","quote":"Protonmail hat mir schon genug Kopfschmerzen bereitet.","rating":1,"review_date":"2026-08-10","source":"Trustpilot","source_url":"https://www.trustpilot.com/reviews/6a79fdb35d21d3393f683027","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 (0fdf8a945cf3…), 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.