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.

“Erinnert uns immer daran, dass wir eine Aufgabe zu erledigen haben”

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 3122521988

Proof data

Record hash (SHA-256)

a1e50bd4f5254969fa75116eefe9a6b40447e6d4baa5046883846f7936d73e37

Signature (Ed25519, base64)

5cWE/fX8LxNpEycOoDsqNFCpxcjY4DS6ZL7+rbZjGqfMM1+8UJ4USQpB9nmzMgw4FlTa5C8ikHDTkvAhxF6pAg==

Merkle root

feb82b7f8aea18b46b248fac49fdc21a6b138fec64dc2fa12c4b3c7a81799706

Merkle path

["a1e5d6b5300042d5508bedbb25df24177745b900dd3a62d9d5d52e01493aabdc","57e3a7a7d51bd65db13768e811bac3e8ca87d873ac974cc6a19455ebc4c9e61a","5df106006e62bfccc2434e9d90d48fe666e6eba6e2b9197b1b96261dd0ff3191","74d9642b7d2c0768f1f4a94ad7d1b6a4e27ded94a3fd8a8d3251e35897b88f82","009fd9c906cae1cf2115ee404ac59a67cdb4341c23bc728c563432089c9ab672","32260cd856ffebf1f98c57ad9c5334c82708afabc74d6fa1a257dd6cf2f534db","67a903fd05f29735fb0d606ee88e865fb06770f92e18559fefb7a3dfc96dd163","e3d28da26ffc87889484ad4eed7d7253fda7cc4842fbfef708c4cccd25631bd9","3b3077b4f19b9c314b68bca409a7d41d54e4265e1683efb34c8a429f1711d724","1d9d6b7fcaf5d6bb33f2c007a8292d2b44d8fec48097df959b9a849b2337d657","7b10c32f80fb45806bc5795cb4f4f04ebee8690ca5b1eb4157f254d5b995d231","9c57247bd0b6e65c1cbc565b7a243d4c729cd2dfeb13ce6f213335452ea82ac8","bb89617499bce359df1b35a0c05252baf549c720d731f7a552577fc93cc48706","e6a39c1e3a8ee923d6c694e5c8148fd9036767f27173ccfd95c1fa41870eb82d","c63ac18932e0255ab2763f8017dd7d3a8a4963e42e4624815bb352fabc7bb17d"]

Anchored

2026-10-07

Public log entry

search.sigstore.dev, log index 3122521988 · entry 108e9186e8c5677afa72…

Expected log hash

9fa0d177312c5b0b22ba9dc313f3316134d71d179dc19912df4abe4610de68bf 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":"v1791343163559","kind":"published-quote","locale":"de","page":"theme:vaia/communication/de","quote":"Erinnert uns immer daran, dass wir eine Aufgabe zu erledigen haben","rating":5,"review_date":"2025-07-24","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 (feb82b7f8aea…), 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.