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.

“Ich empfehle sie definitiv allen Studenten, die nicht 4 Stunden am Tag damit verbringen wollen, Zusammenfassungen des Gelernten zu schreiben.”
Google Play · 5/5 · 2026-09-13

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 2904877428

Proof data

Record hash (SHA-256): cfbe445ffd0d9cbd5786b2876fc50b2c72b93109fa29a684873b75a31b83bca6
Signature (Ed25519, base64): 7CCn1YQ/QHKjUIcPruVPnH3DEXycu5vT1Ubk40HwEProDUqMtJ9ccWwle6clvq39wNKzBPF4FM/9WIXAtplrBQ==
Merkle root: e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef
Merkle path: ["cfbceda153ee522ffe22dbd97299ec0772e33b5f6280252c310bbdde2f0bc872","93ee9825ad08db7ad16dafaecbfc976e1253d72b612e6406007d4cf748b7d3e5","6a83e9f500019ff6a11d48354a4fb84c4e283df71974f6b30586b8cd54f7d976","f981ccd158b0b6fa074e986c50b4d165e5688cee6e23064bf53c08c1e6190f71","9315937acebd22c991f35e298635123c21f0099ee9c11c800cee307182f48e36","d752831a672b7f04b0a5ac20627f59e214849f239c57c1cc7833e6e7399fd099","c8b607fe07655c9ea94618c25a18e5fdf42e5a23daf28b835d16b0cdcfd50fd8","eb833bfee450cc13da107628dbddf8b16a3082f5175d96467cf70bb6f0e67304","ad742d3b371cb3b5d6267a670df6b9414ae8842c95abaec1548ed6fc78821c36","610534309bbd1bfa5793fabc1254f8e9ff0f3706e20effd4937239e7376cad5d","f88be881ea062cb0d1c908f07c2bc25877d657079958d9ee97dfeb71a5747da7","bf08a7b70abd12d7b26586897b736d1c0404f066aa427e277708a875f0cb6bcb","06f94171d32c86f72a9e1d984f2a7c3fa7bd9f00a98eabaa3fbd7d57db71aaf2","e3714293de39ce3c6e3cb9d5ea7711343b19d2be532c75504682d8ef52e8f91e","2a462314156907e42d6f0d96eed96123f1d79516aef73ed189d9f5466556b638"]
Anchored: 2026-09-21
Public log entry: search.sigstore.dev, log index 2904877428 · entry 108e9186e8c5677ab408…
Expected log hash: d020708737f55ccdf49203f373fcbcefe8158cc388605556fbfda3c365de7360 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":"v1789881486272","kind":"published-quote","locale":"de","page":"theme:vaia/price/de","quote":"Ich empfehle sie definitiv allen Studenten, die nicht 4 Stunden am Tag damit verbringen wollen, Zusammenfassungen des Gelernten zu schreiben.","rating":5,"review_date":"2026-09-13","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 (e299bf38720a…), 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.