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.

“man hatt maximal 10 Fragen Zeit, danach muss man den Chat wechseln”

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)

9b25885050ad7288844d8c0682d02dba6be1025070bb601a4d627d146052f1c7

Signature (Ed25519, base64)

NlWNGAbx0vHtFrSus3yBpJ/3aWHRjBbR2jQxip+EnWV+0+4tDGntXKAl37AUgY1vmpCn+GZSOdwBDi094zIZCA==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["9b24190795d07a21e86ebc34871a94821f5fbdbfafd7e1d51d113cad1cf7b172","1580bb6ba9a8cb25e84006705fa522fefe396bbd2b1f7ac42e189cb1a962a778","31af0b087b439708dcccb3e33d9ac150c0c2f9bf183486c16fd93735247adbc1","f6596e4cf348ba78246a91a627226eeaa94f7f546b984040e78cc44db400195e","17387fc8b432fa01ef59db20f935d38055314bb1d157e55ffdc11639a084c1b3","179beb4adfc9f5834a997962da5e985b0fe14a2f8575a6bfeb9e84e7cd434298","f1f37815a615b021c9c7c46e8aadc0f399ce5952e0e1b2c3dda9031233d8df51","5acae2d493cd15baafdd6f7dbc6be669857eda531de59f38f2ef132432584491","99436966ae4502682749561f36fc17969e40a63f6521850b9ea977a37792dbe3","981fac533cc64a53c9714d7171a5930dba9a18c75f0d0256c2d8878585b0f64f","2ffc2611ccd8983110ef2e74a086c318f6a1426a73ab5eff0c34d768ba78b3c1","86f8c9575acc759d5eac58ad776858ebdacefb73351960cc2bdae6ffdcc2483e","e73087a4c89fcbfd62483a37ad723e600377233e603592ed8ad92c5db69f30f2","05978e8b9ad5fd39833c65b8b951e8c80cf426334c441fa8a8bff8eb8eeaf534","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/price/de","quote":"man hatt maximal 10 Fragen Zeit, danach muss man den Chat wechseln","rating":1,"review_date":"2026-08-30","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

1. Open the Rekor entry (pre-filled with this proof's log index).
2. 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.
3. Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
4. The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
5. 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.