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.

“vor allem bei der Selbsteinschätzung von Inhalten beim Hochladen von Lernquellen”

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)

3aaf3d04eff64054601118476acf2c7d8aeefa4b55fd35bf476a7e38ebba5294

Signature (Ed25519, base64)

3jmzMu/8m7HgOfDqvjDpW+tmXRhUpJTH9+TH+kFwrpJsmdgsFxB6g7FpeYlyBAc3y+ahBIIizmmI/ol1N9ciAw==

Merkle root

954962254ff2eae9503796c02bd08deefa3a5722e4ac0b3981007e2b9ddd84c7

Merkle path

["3ab0a0d70c35c585d9163737a7156726bfbd2946446f8bb1e9511aa1e195e392","a8168248e153c5ecc1bfc23534c79f55b1c034cc71e684f52f736f43d94993c8","a8f6f97b3a38b25e812997416fcbee59a657684f82db474e06f93e57b6a03189","aa1bd022a99f247aafceffe69c92961d4ce5556b5ef82e58021fbc138235b164","a87a993eec92aa520a1d2ca0aac4b9ec03eaf713d3a9bb3bd9837cdb7ff1e39a","3ece2c6e0e9dd96ed2c826c6d1075c14059e952dc7a94f882e50cbafda0ef6fd","90e17594a7006eb89b130e433847624ed6ae7af81b9672a47f769165bb009a0e","9c6aadc9890e7ce1c18ba755ec010313e5d4f7ca61d1a170d4dc24fdef032340","092f448b16f6f3cff7b71974237aff55b9608ce843be1f952c995f59b00ae6a4","b0194aa255517e112e18c758c0037d78516ecc24d47db0378977d39389ae0e73","17f443e26f57ece4faf872e420d90fe0ca13987aaa28191f15ad8b704c244dc4","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":"vor allem bei der Selbsteinschätzung von Inhalten beim Hochladen von Lernquellen","rating":5,"review_date":"2026-09-17","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 (954962254ff2…), 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.