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.

“Versucht, eine Visualisierungsfunktion hinzuzufügen, damit Lernende sich den Stoff besser vorstellen können.”
Google Play · 3/5 · 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 2907673729

Proof data

Record hash (SHA-256): e9e91c54f85f72276c2a0bc4a7c8e305374fb99708616cf5671cce3e8c3565e7
Signature (Ed25519, base64): HVRjXVRUoROXrqCFWw5jxp9zg7E9YzA6H7upEdthtBtfVUm5jmgoqsLqkmVzua/clThmSpyna4i+puz6vsvgCw==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["e9e99863e68c1a1304711dd749710a60bc2bc91357321874fddb51c1b41e2142","c287ce2fee9189bbc7474da2cab64d501a3ee22e6377b6332b53a2949b5ba7be","0c53d863c559e040a82c9d69aeae27d2751ae61b43f0b5ff37fbffca6c7645b9","dbd800cee995467dd2e934d807e72301ee65cb517427da2a4c68cfbbca3805ca","536c5d8aca4ad0398666fbb694ad2b8270d3517da069234e28cd03bbbccdcd9c","8c2be2590facdb2539818497172855aeb26d0029a3504860d31907e6da610ba9","5a1c441ff150a89d6a4965b0a7eb320c682ddda1559a8c17176fd1183e5fb878","4796430840f44617a6baab5f90ef7e445cc45c6e13cf7a4a83f0787f4ee54f98","86994c23bd8868838e9a5db1abc7494dc6ef962f3ecad77b56ec3887bde6444f","042f0fec74521bc48ab41f2464714f41d7bee9882be5ad30840278c9559da714","bb894289bb71d3b696c9afbe454a75a78b206d9839b23e1a62e36de1c4316674","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":"brand:vaia","quote":"Versucht, eine Visualisierungsfunktion hinzuzufügen, damit Lernende sich den Stoff besser vorstellen können.","rating":3,"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 (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.