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.

“Diese App wird mit jedem Update schlechter.”
Google Play · 1/5 · 2026-04-28

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 2513802575

Proof data

Record hash (SHA-256): 64f856bce6fb3e39a550d6fea859aed607327d757d2964f28a715139b76ba491
Signature (Ed25519, base64): +Z16CL2mytGueR8Hy5ZAJmgfm7sn/nbM5cLmfrkdrJdl/rd+F00eRPQesWAi8xaNVSLc/38u7yWdefvnTjF6AA==
Merkle root: 80de158564b7616572ca0c0059561f6ec90cd5bce49a388e61df989f3f6f2a86
Merkle path: ["64ee210ed71ab41d6104a73e46a1f25ad47b8cb0113956b9a3f405b0c8d0e4f5","68ff4e74de4c4883c47e9a93cebf44b3776c73370613f0ddbe3f980d91417903","6a6f894cae76a9be093b9f8e5c040cd818f7f31a34430bfe9b21b2aa4513d634","95d90fdabf84e53e204207db79c3d0ac93863d318ed6206b7eeac59250526c0d","2438673c4f3bc4869e73250a65f1a924b4f7560bb9cdfcc59b941df51e0465f3","2b76ecc9c44efe9d17797f108cf6b14d93ff81bcf13411860720e8135c8b0706","5cd56bd281287c3a3ac5f26c10acd9078f4885ca57a7a1fb3192a5fe8d9fc01d","693f165e1cf01af369d514b6fb053ffa8dcc54ad2ce05e779e75e8033310d15e","40637605fe7527757858bf15e7c00c7dcdda3dae696d0fff2af50242164bd2fa","985a75d818e9245ff6871c39a508f5c104992518a69cd60130670e434fcfda64","b02e4791599e4ed3f86f31fe77c3d89281957363014bfd7cb4bad081366c2891","fb884b13c6c7b6fa45ec692f0cd19450269fcd13629216d89df8f4f8f28f63db","4030647c2ef4f8e3330609d1b1b8f3b58008674f60e870e605f772c875dc6aa9","3492e7b3aa9fff62b956cd07fc3f980ebe20033aec60bffc5a515ff87c949351","68889fd35b89925b8d265e65260618471cd9c2f5458718fde3d6cb3829d8f00f"]
Anchored: 2026-08-19
Public log entry: search.sigstore.dev, log index 2513802575 · entry 108e9186e8c5677a9216…
Expected log hash: 5899b5d0ea18fa3c879147333708054c2e3cd77662f2b6f633aa3b5d5512bbe5 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":"v1787121142818","kind":"published-quote","locale":"de","page":"product:acrobat/merge-pdf/de","quote":"Diese App wird mit jedem Update schlechter.","rating":1,"review_date":"2026-04-28","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.adobe.reader","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 (80de158564b7…), 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.