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.

“Have recommended to all my friends and share study sets with them.”
Google Play · 4/5 · 2026-04-08

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 3241084060

Proof data

Record hash (SHA-256): 337860775af3e66d124ad91ab72c429b810193b8cd770e793373029b031d7692
Signature (Ed25519, base64): kE6rH64forH7WuQm56IRPqLK5wgF2JiAdniEStz31AQz0XsJY49v7CWoDZWI69o1TAQ1WA1wvLiOjHOVWqLjBA==
Merkle root: 0b0c0499033d3f9b3953d31e6c838f88f12988dba810dd4de44922e1b60fcdf6
Merkle path: ["337a14d04eb37f7f87beb9bc18f2741e602f4cf96308461b1ba379463d823e5e","95a7e2b4c60712ae5616e6c238a8f2ccb10e003cd45de8d6a061f8bf71f8d4d3","019d969918c950397873787d7a05a0a951364f5408b901de31ae45e44921847b","427785f690846a9770c38f28bee9cd1948551c5357e55efbb778dde8de477d81","8c12a0ea343d20b7f2aa54e63523ff9963eb3a00fbd8d3517eda69156ad91db3","7bcd7fe948e8c580fb54030fca50d0aa7be7d7564501edd012326b783d1f762d","185c32f07779af8f954d80bfdbfab53f1ed5f9abe40e483e7ca355e1d24896d9","aca68f2f5e5619822ffaa001b3e33e58a2dc7eac69f93176bf06f48fe7bb6c28","0af8d875e584c7daf99f3ddf01145a32aa1bb0a65be311c17db151b77c6d2a58","a94788bf178bc1e727f0ef1217ad8966d66bf9e31d1bd1cab9bf6e5a8dc6419d","fcc462e15b27af6461b91991c283826c6009da04d123128fe13ce19daba55b03","a2192486df88d4dc6da5dd9f9fe72a80fcb0210cda38213ab9466ef5ecabcb4f","fe7751fa4b9a0ad43fe0710628b6cb1b92e12eb8a60d9f17eb0c0764d693577a","8a05b9e19287b30c7fb54816a1fb848939f3f2c84b9825f19f342683d5db13aa"]
Anchored: 2026-10-13
Public log entry: search.sigstore.dev, log index 3241084060 · entry 108e9186e8c5677a3e82…
Expected log hash: a291e2473f1a4510a666e020d4d424e463d55bf4677b91eb5a52e446e5ff1581 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":"v1791865115768","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"Have recommended to all my friends and share study sets with them.","rating":4,"review_date":"2026-04-08","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

Open the Rekor entry (pre-filled with this proof's log index).
In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (0b0c0499033d…), which ties this proof's root to the log entry.
Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
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.