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.

“Sie wollten mir die JAHRESGEBÜHR berechnen.”
Google Play · 2/5 · 2026-04-24

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 3139760477

Proof data

Record hash (SHA-256): cdf27ddc2e641088027c0ceaae999780a744cf7c0141e5ff7a033fe7ece10048
Signature (Ed25519, base64): LMZ4q4cm0DJaXCK0vU5aaFRRtEVGFVlF3X5rX5gXakzFB8y+ZdtMj6fUcWsCSxgTrEqN1BemA8AsJAUpZRDJBg==
Merkle root: 49133e6803d24035baa1544a5c730db93dbaf832df48f680ca855944337404a2
Merkle path: ["cdf604c4abed7d1d17f082c9ff7aa412ddeeb8ed2c177df7a4bc826884f23d89","8c6fe83cf02ef2033829bf4acb41cebac8b8fffba8e1b55005f0b9c957992a1b","d5cc0b0a8dbce8f680920789a22e04a63cbd06830dc56b61339337c8cf9f2a3d","129f1ff130407ee13414f9e0fbdbd477cff5549cd6ce490279b9f5bf863e3f9c","1f9ef47dee81ccb9c673a3af807991133a9ebac85c0c276f5911dbfd972dbaec","640a528be91769073d3352dee2b14b722725a3702e7fc867e56a51733f45a63f","052fb0538a24942e515a33562759d578fa38f17dff8393118575a59ae225f4b0","71409bd1ff0c575b6ec831a2829fc8c0ce7aa32231ab91f6bd0942a425e3513b","a69c3381db80cd9124ceb5e46a2989eb4f626464edd3090b8162f07eeed83cf2","a8b8a1bdc1b533712bc6e87294df1082823fa2fb0ca49fd67f042d83371e2f79","484d5d8353e46708d70f22faf61b15eb5ca82faa50b0aececab10f9019e7d936","7924bec904b85c9f773d214a0a251d8b0a1110aa9f6113d6f6558b4ac58ea7e7","573e30281798543ac2707059ca3c966f21958c0a972fe6cdc3a54117b3829e49","1fef2eea1ba7233240a645d2d99dcdcc4e3841bf30f06929c9f12592e46a0c14"]
Anchored: 2026-10-08
Public log entry: search.sigstore.dev, log index 3139760477 · entry 108e9186e8c5677ac88a…
Expected log hash: d54b6e5e20903e9be29e6a5973227ee9b3dbe61bdc0fa6481a5788472cd5976c 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":"v1791428432986","kind":"published-quote","locale":"de","page":"theme:vaia/billing/de","quote":"Sie wollten mir die JAHRESGEBÜHR berechnen.","rating":2,"review_date":"2026-04-24","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 (49133e6803d2…), 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.