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.

“Es ist super einfach zu bedienen.”
Google Play · 5/5 · 2026-04-05

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): 3c5a4436ea60cc8c2d59c00b0dba939a31adb97393ce0ea9393ad26dd4948f45
Signature (Ed25519, base64): A2R07cdGPAdvGX0qSZORXs5po1j91eyJmajnrNzH6slAHKrySmzlqmFK68vCWgU/V2JxIyorCXAsBS1UL8cUDw==
Merkle root: 0b0c0499033d3f9b3953d31e6c838f88f12988dba810dd4de44922e1b60fcdf6
Merkle path: ["3c5c25328198ac204647f6c6844d19ebf09d78d0d015de3ac5fa8905292e90f7","5568b453250bffc257ceccf4c4bb6fa158005e64d2955377fe5f0750dfc17089","6474a8ccc501d27befca3cdc02283735a2c7e54224288d34e19a9b5a124d5528","0fd74cb9a5154c19d30d92aa164fba7ec528ed36204a35e43291b0362307e9fa","1e6f1d7eb355e808dcd6ecfa633e220857b6a28ec7596333273bb8ce1a0e0855","f5fd1d45ec6c029ff621b11aebf565f040796ba010d42cd2afa5dad4feb6a812","4603950408fe0179dd4fa12442e517d4bf666d1b31a940b34bcd4e7ecae8e8d5","ad1e2f3ed63b884f5fbc0c9aa8c61b84ac8f907f1c908d246f0480d0c3630214","2180f1ca9191f99ba67638e5334d1ff03a73367a690fd944e438a141ef924ba5","368c1275a5d1939ef0925135c0a3cd91e30072150e7cdb58b6e2023f8d71a891","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":"de","page":"brand:vaia","quote":"Es ist super einfach zu bedienen.","rating":5,"review_date":"2026-04-05","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.