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.

“Eine fantastische und datenschutzfreundliche Kalender-App.”
Google Play · 5/5 · 2026-08-05

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 2683647879

Proof data

Record hash (SHA-256): 09c7208909ad88d1454101b2d1400f203819f8baf784881b325599a89880fa47
Signature (Ed25519, base64): ba7gJQSnV7glicyHpqggQs54DiMp2O7fMpYxDxUb8ijG1oUc391Rml3jFdIFYXzgoDyJGveRqp0GKClkaQBXBw==
Merkle root: 2e3d871c1322192f29eecddde09b1d60f3198d79e780fa1195a664b4bd06a864
Merkle path: ["09c4e3811aab6659396347c6b7112df7f123fff7265c05b7ec425ff6f8a69eb1","207badf781079fa18901ffcce64a29b1c88bf62f3dc1fc4d1f3de9b97719de48","1501bd0965c8c1f00a6662ab661b1d9b908ed34ade19d8fd800b8dd07f8c8913","3198bd511186d163cef048d7fcd6e4b0430e1be04cd92a5f8eb3b635bf1c13e2","a0b8ddaa2c74201bcda46c086d27397ea294ecc19f481e506be4078534a7f8f4","53602a796d8acbdd29c04320a395777ee9b5084ca3fd3f24b7d2c40e893f986a","1fddf769a89cf00fe97c6e1cf8192d208edf4aa2333af589d48bfc0b62166a3d","399984ce91bff843898d7f608b9a3519b771038764697bcf3978a7c2ae504f72","194ab3917adac3a4c5d8a48a737b023536082027abced95afdab9728bc68cbda","69809b58deb29acb3bfa81cbefe20114934a9eaab74bdbbb0c33a37543b819a7","8de13ce033734032633729738c3f45000a50d2fbb1cb6a3cf8b071323d95c8d0","0a3d33fc893d1918590ed750d53fc85f13e25e4f6ff7a207d21b4e073de50d53","2d5b9611d8c1e5387c2a259b0d33678f993a76db53de4243f9d133a0209868ec","628ede9e9b0730d1cc332c261be38ff7c8dd0481f36e9cb85c838852e27c80d4","8951511b8bccb72998a9f731e365024a5c886ecac866e59c397ec696591e8130"]
Anchored: 2026-09-02
Public log entry: search.sigstore.dev, log index 2683647879 · entry 108e9186e8c5677a3d9c…
Expected log hash: 9b4e6e5ed792dc8e5468e146cdb00002a33cda5d0fe16d325e3fdc5cc54bfd3d 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":"v1788327458165","kind":"published-quote","locale":"de","page":"product:proton/proton-calendar/de","quote":"Eine fantastische und datenschutzfreundliche Kalender-App.","rating":5,"review_date":"2026-08-05","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=me.proton.android.calendar","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 (2e3d871c1322…), 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.