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.

“€90 per year is the minimum price.”

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)

14f9b89fc9ccde416516def0a9009dc55208afa9e8b917065a3f81b8a8ee7c1f

Signature (Ed25519, base64)

rznrRUa3NaFmyP0+J+6HkRxptX88ePsIV+jeDp4bXDbJIMbUkaqOiKkq7m8gJKgbs7I/Nlvpbmg9XR1FO+KaCA==

Merkle root

eee462924587f8024361bc8d60043805cf5210f8bd2ef7667df06d093552f9e6

Merkle path

["14f8ccb068247a2f497cd5ec0040a43986b38d705ab3cf69de9380d9cd1cab8e","f4470352f3584e6496f6093194dbc65e0b1c98ce702f55008d2e39dd1c810555","c190e8b56dfac0d9e94c77c8783fe6a14e3bef2b251fadc3ed88ef2796620a9a","6665d2b2dffedeed1e8c93f8908bb7cce406c7cb1497e37a87dbb220f72d018d","6bdc91e73db8eb83ebd98faf4b0580a523e91e5fe8d0f7294b9db9e7209c3dc1","de8c77c6658071d2a57b983e6a98cd6589ab228b17668d789a5ac69ddcc34c38","2b5893ad25ab057ef60862a9d300fe6d3636b455f5756c0f64ecde7677fc98d5","f76ad79da2d762220da99fd8127ec9f94a46955b4d6b1e8c8d408af7e3f94640","e81773db65b60c9903837e87aa6fa62de684f25cdd52288134e5ce4381e68104","6ffdc0654da51f74e0c6e7a177ca25049035365f1594bdd2c1334734672b1acc","64ea0a98d3502e2409bfab63314088d374e763408e939b5355b3196a90401df5","9a818f1045e037b5c81556d7f6ec6165a24143565f78e16f2e84828d0670eecc","2671ebca141255a0c11a3bc51354d8cd008634f7e59a58a3f3f9dc756141bb9c","a445a39a48770a8fbc5d87a405ed660d401fa810eac6fbd1d284a96f8c7d5503","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":"en","page":"brand:vaia","quote":"€90 per year is the minimum price.","rating":1,"review_date":"2026-09-14","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.