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.

“mein bruder hat mir diese app gezeigt”
Google Play · 5/5 · 2026-09-13

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 3239939960

Proof data

Record hash (SHA-256): 4ee6060b46aca90b705a3176fb3ee69656c050a73aeef246953efbbd0768b8ca
Signature (Ed25519, base64): n3djZWtMO/tWPpZG41zq7Xl4SZw/OPqgnJkDY5gw9eN5KcW7LCtd0yPO+xi3B6XXxacOrCnebRQsH51jde+KDQ==
Merkle root: 954962254ff2eae9503796c02bd08deefa3a5722e4ac0b3981007e2b9ddd84c7
Merkle path: ["4ec29f6d2a1d7c4d86c1480cc581031592712820bebf03595886ba7f0199a05e","046cf071a5387addd97cfc87f874b9a5be731f974dc5fccd625e2a2a3edb7f44","8a3cb93762ed0b75f7d07be3074dc2110e25d494332bf77b9959eeb1e91b09a0","31117cefdc6b6332fe2488bc7eb7b2650b45c9f220c8aafc6420adb8741d1f65","7d24ec91d0e472a5edb0fd181c3b30d5411b4cbfc1a9d9cff45acd8bc4f28abd","6350a5e8bf9b2e70fda0d600c8698c8f2e5eeb3d103df06f9eff5bc814cf54f1","4b1522fac91fc94dc22c9de2ca9a0e35ab23e7ca425b82b0ac0143463cd07e48","09de4a2076d5f1bb796ccfe396f4cd9bf6592f1a08a1e29a6f635aeeeee48ef6","78d4c0f9750b75b61602a84dd407e924a4ae4d848f3fbfce65cd726312611bbf","028cf34aa5f993770ed50df52afef6ae12a9c4df61d3aaecfe0ca765f470d0d3","780157e889b8acc868bdc5fbd2b9f6d948cec0f255310afe76e4ec4bfc3a114a","37d889bdc912bd16145284899ed1544c934e2d5178cc362b2ba799bdeaadde22","07b2ba787804bc9fbb84c73bed76b7f65ff1b8c1694261a8264cf5f3209f315a","e7bbbee54f729cc449b73bfdd383c96b7b180e618c270037b5697f1fcc75f254"]
Anchored: 2026-10-13
Public log entry: search.sigstore.dev, log index 3239939960 · entry 108e9186e8c5677a0082…
Expected log hash: 28fd9464b857a07e61931e67235e692cb8af33d7541a60ca163756a54a64e9c2 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":"v1791859824762","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"mein bruder hat mir diese app gezeigt","rating":5,"review_date":"2026-09-13","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 (954962254ff2…), 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.