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.

“Wie wärs eine mit App benutzen oder den Screenshot angucken.”
Google Play · 3/5 · 2026-06-17

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): 3ece9d6168225cc48fd1af95295c842934e715bfd7eb80b39f2ad2074b5057a0
Signature (Ed25519, base64): DFeFv+ghrX7hQGXUYw9G4929i9jYxxZsu09lPu/Zz/2DIEmRXcrq1eaBq02KC18EX09Kh6+yyWkcCtmWU0EXCg==
Merkle root: e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef
Merkle path: ["3ecf0a8c666bf2396012018e571430690b02330d13d5fc9746e70f7db57c4d2f","0cd937c80cd281191d50f3e1143b72c8722e46b3c6fad5f1113da5f357479901","ce7f73e745384a9b349785161a35aa5c9299d52e6ccbff730a70e0a6a3c628c5","63ec67a730dfe1a87bc1023c15573e4a7d2b861894290a09df92d65180a9af9d","955142fb39444ce7d4e3af7e98478163da589ad52079730a2c12a075f385094d","6d7f91bdad63337930fe761bbc360a695cec098a82eded865855dd113bca3058","a8b6ed92c402a859d3cc2407a0d5522a41b93b67b8836275980a5b71bacec523","9f3e65a36534b0bc93bd206b187c45c2b3e070d31473b1cd538c3ccc6c6abcae","4669df279f85314ae61728389560a658c99e63dc06644b2f76b3b48dac4cf4ab","8c685d4ac126dce36865d1812aa30785627538177ac02f91aa0cfe79f63d9c30","90df5c697c0e7ccb431a46ba4929cb93820a83012f63a3114aa3e7fb2cd52253","f61ec008da9cedb952cfe797489f2f8391c0dd3d9db879feb9a9aa5b68ebbac5","b296372665f7c3838922f5e4d88b25d49437a77f990ac53d0dda027dc9495fe8","2e838893ef313b8ef0f87568e1e691fc197dfcee84413640a12968493decac73","bce5d442c07de6307e5ea8947098e74ce88c2246eda5e5fc1015a6d7519228a8"]
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/service/de","quote":"Wie wärs eine mit App benutzen oder den Screenshot angucken.","rating":3,"review_date":"2026-06-17","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.