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.

“Die App ist sehr übersichtlich und leicht zu bedienen.”
Google Play · 5/5 · 2026-07-18

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): 3c054945eec96e6bb78e400406b483cb6cfde70d54cf69e40994eb494b566f7e
Signature (Ed25519, base64): FXM1A383u5/hD0GUr8cMoNykkJqwY7qDebKhqk/Venw1bgHlJwBtXtJIxbd0CdES/K+kNcU9LNPKJopfDIMdDw==
Merkle root: e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef
Merkle path: ["3c083013a752a4da6f6ce08e39fe3bfd7a69419afd683309b282aa235a73ef7e","c4e97c99b39bb34d7fa739131de4e67230e9122db5bd3fa15532840b0a448466","2e1cc0c64cc3ed8258f3e0a2f57580181ead01c7e8026a116f1c90eca8d22272","d740bb60e2e17fd2ae5effc20acf87aebdc8c282547696c6efbc24d6f956d43c","9dfa6f9b301a2b29af8ccfb559bc667238ebf20b9cf2729ad4558e5c8bd80fe8","b6ae49cbf436eb60f3b61177f4dffc35e35a6786f3d060bb5eac816e87763a99","647c3dacb3a62e37b70b53f97494106fa65f7aa8d405c348a868dc1ea85078ac","723c5c7bd413b83a87ccebd5b4de5ee8be99b24cc88cbba134832575233e2e37","41b30baf1f25881ce88aeaa28c8869da66ff06baa951c3306557663f8f04bc35","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/ordering/de","quote":"Die App ist sehr übersichtlich und leicht zu bedienen.","rating":5,"review_date":"2026-07-18","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.