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.

“Die App war ohne KI-Implementierung tatsächlich besser.”
Google Play · 4/5 · 2025-12-02

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 2907673729

Proof data

Record hash (SHA-256): e15005ff098804f05bce4dbc127e1f5e3ab681b35232e59b6973835d57e41ee3
Signature (Ed25519, base64): 6415PQaGD6f+OiPGeMhZux5SOhbMl/YKXdtFYOuPy1cCdY9MUypcq/8cXvSCZDUx/hzE0UNZTgp5T7sA7KQHBQ==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["e14dbf345158d2f0828c0a5e801dad48dbd042fd86bfcb7e9730cbb224000fd8","28b31061d61f95a7ef4621dc77b9585ec6df24637d8bcc70deef3ed984ab1fe7","5d8ef7ef5cc20877ff201494333413f7edba9d3b4da084718c183af35e462c28","689b6fce2b0f68135751bbec2af6d576502fcdc4e6b9f1f558c7cbcb30117dd0","88e8306e2d945b47b106aebddccba55ce02b261033c212733ebe69087cc315e5","84f9aa9bb2a2a75b78fb01d2ecf6afd8d408273ea7377f244599dbb9c4d91dc6","029f302c7e3db631721f5562ffef0ee741e48517701bf6e1e5c6fff40edb96f4","a40dd9b457f63c7645b3e97671299d3064cd6b0bbffd71adb53fcfe7762442a6","928604a4c46c5a7dda6d9261ed25696d0f4c3c3226c5c8417b7021ed3d488fa4","f18e99ba7a78a6b565d7d78fe31bfc86a3092ebcdf35bb1810c3397e6664a935","d724de4db852592012d7e350c865d36fd56f7f3bf918292f4d807bd4b562df22","2d0841904d905b327cb803816e73e56fa86447bd28a90f792c27c874ed9a6b9c","c975f4076f62a76765a4bc502e988829db65110a1650004b828d2dfb5f90a9da","f92a7fda99af63eb008476cac47b147880eec6868f847624f8b438c917195408","4543e8b9ac7bd077d9526acfdae449f0a0d5517cbb42414f50ef930ecdb9470b"]
Anchored: 2026-09-22
Public log entry: search.sigstore.dev, log index 2907673729 · entry 108e9186e8c5677a06ea…
Expected log hash: bf9a74000249ba6e66b1e29aae9d8cb95c3400dc118569a80e5c0949f3e8ac62 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":"v1789969984102","kind":"published-quote","locale":"de","page":"theme:vaia/durability/de","quote":"Die App war ohne KI-Implementierung tatsächlich besser.","rating":4,"review_date":"2025-12-02","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 (b9a08f9d6d76…), 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.