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 2594955598

Proof data

Record hash (SHA-256): 089c78cf9bf570f3a07e2affcbc0dd810b94f57f7766c69423a955a265b7a160
Signature (Ed25519, base64): C0gpmUIT5U6N/Opfu3zIFbCssKxC+SNQOhEWOPxX7Z2PVgWT11Niv+co4oEmsw/ie+K9ZjalDd1v6ScWbBUsDg==
Merkle root: 5d9e24aa3407e67ea2f2e26a5653a6d0076935845a1bad3488d2eda2ee88a81d
Merkle path: ["089ce4f53a81963175494215540d7bf0f31a93082f3007e210e68b7a33bb5f1e","d3706d0afdf0fd944f320b80f28ea76d7a87cb4610d353a8b579d4105c3c08fa","5ab424d65f445c0f84e1530999a6e213e6d154f6bfc49e98b14d72d21cfbeda4","b77524b92a55525a7031b8466808804ae27c8f915485befe120c7a33afe35889","b40ce136bc0e857df3f5b3cfa79a8bb4906c213eefc133e2915c8cb73bcb8620","02cdaf1b8a4c0483f12db08f49f592f4ecf316902908505090d8ac581acccd02","c7d7d9c83ebfa30373d09589fbd586d8349d72df638bf0e5bad3ca9e1bcbfb8a","62176e3495b9714cedda53c15310bf1550f979811d0ca09378df58bb615cebda","32ee85247c90b24d1813627cb2aef8ae9240687428f1eb89e9994f5a39a7f66b","d412571709fc9b6a18f79b910acf3c2869aac563d54c6b93e1cde41a7859e345","7e4d80c76a44bc64f31ef5c154ad341d0022071fd5dc286c533dc0a321545313","c8f76ca8defbf8ccb375fa4489c615b5d155a09a82432439ffbe5296f7a55c87","88cd2e092d86a2cce16a67d96208f41b86bc5e9926af919d175142df77f901fd","d52b5f7abb2d6c19af7e500fdba55bf56c359acecf50179e194e26dc83476c29","0df45e9918aa8c399d7782a38bada433a6ea05fc7a52d0a6a2d9fd2f836d191c"]
Anchored: 2026-08-26
Public log entry: search.sigstore.dev, log index 2594955598 · entry 108e9186e8c5677aa8d6…
Expected log hash: 98300f71cd632ff600fd4a8df7e6291aeb56582c5916b3a391d1e3bf72ef7104 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":"v1787717033238","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 (5d9e24aa3407…), 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.