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.

“super guter service”
Google Play · 5/5 · 2026-09-17

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 3272274666

Proof data

Record hash (SHA-256): 430f3fbdca4d84ffc7e34328b8b4c96327f3df59343847d92d2def78c873bf57
Signature (Ed25519, base64): EX+nRFVWmTohq7FbACi0Pt4ncN2f5Vi1VTckvAioC/rrOiAp0Hp5ZIFK3BfZrR1bW0v+Y5FYxtoMLUvUIP+BCQ==
Merkle root: a4d47c2a34f6eeba31e2744fb1551fe9a0e34820dfc152f1ad93a68b24759c3a
Merkle path: ["430deca6cfea2a0a34a77ccb6c27f99893eb5c676215bfbba7583ce810e394b8","a928d504052ebbb86b1e488530dda37c9ad50f324c86541d03ede739d4d5c94f","bb2323b9f37c354464363083b5e5fe98dec425df726c6fc42193e4b58e81343e","f48b81804330a501253ae36a9f0e99d909bbecb5829a68f62d884457663e4634","41b480843cd6b9c8a5058e6c2d3b62e0ff6fea378cbde8cb48ae455c5865769f","056b12c97eca74d1382062372b82c145094599aa9fbc8b53c589064ee2fde368","d68b8761eae1434c35f711a59322cfc38d737e570a28e5f0a0776358beaea54f","b6cafbcac248171ac1d4d367ed8aa12f659f5b0bb734ea4bba419f1e576a99d0","d6ff45f2c7a87faef9d3efde6c776ac8fe7650a043368d71177913b8adc401f3","234b251913a4b9cf6e5e752f39644b57b8861e5188ffc3a9e35d5a7870ba29ff","0aadceef0f0d856f742d189406dbaa3aa5c755ebe9fec69552e8b54169d5a407","349e15569e0a1f4fe3a9d16d01f014e54bef7124bbf1f14bdc15063bbedc0e8a","0d7c4faad4992f205f2c1ebb2b0e4b1b7e9d070f1f77d3f8d64b80626c324f46","35108299fffbb5c1a0d86f074b5805457d73da5ec7c848a19bc9a928f6a42a99"]
Anchored: 2026-10-16
Public log entry: search.sigstore.dev, log index 3272274666 · entry 108e9186e8c5677a2724…
Expected log hash: d56e71820b4c8c62b755e9f6e3d2b624566d12db6dd1606e99ef55749400c387 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":"v1792036997995","kind":"published-quote","locale":"de","page":"brand:zasta","quote":"super guter service","rating":5,"review_date":"2026-09-17","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=de.zasta.app","v":1}

Verify in the public log

Open the Rekor entry (pre-filled with this proof's log index).
In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (a4d47c2a34f6…), which ties this proof's root to the log entry.
Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
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.