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.

“eine Aussage richtig ist, die Antwort falsch aber richtig ist”

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)

ba02499d2301c00a67c37e1c369400a0dd010529a910c47a5f3471b4b2f20381

Signature (Ed25519, base64)

BU3I67F3hxpfn+gM8N9AeYq5EPoTzST/1pd6F60a/DFomNxhc4oQhqzXSapOFP+bBQmQzvXq2O1Zz6pX3X2fDQ==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["ba04232c7a16957afef2ab7afd1343c051e909f8f034a9819359b0e5352bdf76","aaedb17f1cb076963eb12cdda7fd1faa686ffd7b752c25d38ed0cbb26203c89b","36dbde2194b70642f03291f1d11e359128873c9ab8383d6e036cafa538133af6","dc840dfaf167a8831614fdd21e26f6fbc9e8c5efbc86a6e64fb68ce3ee49c84d","0d1c0a0e969123fdc791b793771431b517b534439e03408b3121392d09b8ad0b","5fc3cd0c95e9a35646c3ae004c1eecb861650504e282e393c6a4ed09d60b8e98","98585301ff05613b4774fa02d2ed2c29318cc50c8d9d83ae374bfbe91684ba11","d63749796a1ee6e52c4fb93b3681cb217df59fa44d5d4817e0fbcb37e41c559b","4a3e669c098df39fca13fed4d6e0ad1b30ef23699601a1922dfb84ccf5f88fa7","251944895ce899850879f813817c0cd5f61d37012d7786da54770281c7c05f34","857e3ee1e9d95b5a725ef6d292706233d4b7b1774706be7cce942c5ef1551bcc","8e90fbff84453d26da9a25ba9530d677aecf62355e82abaefcef4642ecd6818d","ff0ce3b59f4b6fff6b806e01d20d764fb2b7a5651693c19ab4bf8a8b5ce5f968","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/quality/de","quote":"eine Aussage richtig ist, die Antwort falsch aber richtig ist","rating":1,"review_date":"2026-09-09","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.