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 muss für die Funktionen bezahlen, die man benötigt.”

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 3178600936

Proof data

Record hash (SHA-256)

c88f9c3c7eb0e8512b9b7677de0aca059e1d709b698756485b3bf897d5b0d07e

Signature (Ed25519, base64)

2EwhM4r/A5mu4O3yeRPUS12xc/c3EI0xejciy2+8AfmwIplq6Tvy9MAG+ytitLIvy8KTA+VUOTqlYgAA8bXMDg==

Merkle root

eee462924587f8024361bc8d60043805cf5210f8bd2ef7667df06d093552f9e6

Merkle path

["c8835a12ee17bf905de5e9b6dd9f4fde278374ada8518cb715c79911240dbb2f","9e12ff9218990b5479382ceae6346a8d0ce06275e48de8e18ae5a9f77fa9186f","d4ca58725c1b8574192549e2f013ed953b0c93447a1052b5e01b56b6bee04afa","4543aedb63bf1d5a8db8f14985c3f6ceb6a120f70c8763ee955e049da15f5e03","2e016f9eee980bd9951c12b87fb4bb7c2a644217f768da8d86fdb3ed43182add","1595d7387868f47e73f7773057dd82d0e31ff35f33a5fce836a49e448b03647c","15f47224fa3191b7631b5f0d055db963a233581f7a5ff070100aed867099100a","29d03b6cf16d47d1f6e2853077512149b16fd2b9930c474d21ac31684609efaf","7ee6231acbb28821a9ace7b3b6820b7380d1b72a419db27e1f198050fa1988f3","ad4670fccec84381336f8719106e63135f321373239d3715ce04658afe54243b","e32f76b60827bd56286015e973a1fab659f9bd1acc94330d671a39b6c6593a02","7ceea1dc3abe07a463a7dd4a33188f776d9293ff3ca31a1c1a2787300c1110b7","d7feb064a92044c8859079140f59232505ed2b3b8917786204b22dedaf037269","f5776b4aea049b369136550a2eba5c5f94aeaa8e5ccb2b2ad336fc6ccf74ea7d","452f4fcbca19997a15e6a6869c50e026ff02cb90a6ef21da106ee0457e55941a"]

Anchored

2026-10-10

Public log entry

search.sigstore.dev, log index 3178600936 · entry 108e9186e8c5677a6a91…

Expected log hash

f3dccf508afcb5e89d56dabc8c5aead85de215b1b896d057d463ea1c1bdb13a3 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":"v1791606586319","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"Man muss für die Funktionen bezahlen, die man benötigt.","rating":3,"review_date":"2026-08-13","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 (eee462924587…), 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.