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 ist wirklich klasse.”
Google Play · 5/5 · 2026-05-08

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 3198225546

Proof data

Record hash (SHA-256): 2c35fa5858784c60723a43959c5b54008dd2b9ed089d709a9267d6e464713122
Signature (Ed25519, base64): B0Ok+XIITqkQpxjmFkHjPpAopaSLfIN7V8oJ2psGQ/H5J7PrqGheTTfylV4SyWj7W9lkKEpXTlHo8tNco0IHCA==
Merkle root: 12764493a64961d0e0d426bbec64b837c2e35bc22a58920afcc56db07df6e8c9
Merkle path: ["2c35c92b46fe12aa31b5d9609c4e6c1980a5eca9eed04de55a7574463e933a8e","f2be3594062fceda23a615cc87880925db7b59e9ba3c965766d260e8c3280723","e59443c24dd32f7586af07bfdc911f5c4de2b5aa05de8c17bd19ae3efe840a30","1ceb51f78995fb31319a4ada32da5b4567cdd769025c86bc38bfba8477778653","732551bc2948735d12f72960049d4b9dd8546591ab49a03e85621be24c50b565","e23d35ce56c2bac5c7e890794c43ca34e14c1aa6623e96538ba42d0ee76a1c62","ca547c5e976e3c1033f923b5c3147a1a47244f7ad30e66339e603da210f03f71","47f2b5272a67b26e24519d2943aecf980f7cd98e93f95ec0fc988060ee9ccb2b","7b284418fd8db2ada82564a1473e419f5a1dcd91e486308b90e5ec50441b4504","84a70a35933ce978bd01a79268920272c27e137418362d80ddfd30147d59e7d6","f21ff959a638ed664bfef10f083a14e62333d41f01bc38bad0e058c79273a381","b52a8a3015ae5229f5a7205f9433251f53bb2b22b2f3bb0bfbb3deb2076f2c89","b6c6b7aa75be4fd4f206793d7c98702963f427cfe45d9c46972416cafee9a131","bf01790763bd70681430a2841b8504c59b88918b5b88c9d70f6ee7041d7ca6c8"]
Anchored: 2026-10-11
Public log entry: search.sigstore.dev, log index 3198225546 · entry 108e9186e8c5677a10cb…
Expected log hash: a11b46fc63b94f32c49058752856fbdc4e92f7a41d4e67238e3563657fcd50e4 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":"v1791685609571","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"Diese App ist wirklich klasse.","rating":5,"review_date":"2026-05-08","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","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 (12764493a649…), 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.