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.

“90€ pro jahr minimumpreis”
Google Play · 1/5 · 2026-09-14

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 2907673729

Proof data

Record hash (SHA-256): bfc6b403f1c8fb0e7043d294f6505632992eecff86da4834197b11ac06eab846
Signature (Ed25519, base64): +KE4mW/g0ZE+os7sLEccKbMFGVnwtHq2WfnW5fnb/DtWGhb2+R3YtYoH36TqEM6Z0/sSua5cNGBjcHU71pAzCw==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["bfcc90b0771687599a2540385d8d7b655ea60627f09de63b07e7cc330d543d05","9e5e846a76018b2422da3ec80ce68331d3e4f88765209954ab880d47de6b7d83","6094503f5daa7e0b42321ace380819e978ac849bf3445501a1ea8ae9293619f1","4b53e4e4748f48b1c81ae594b2018463c5953c49fccecd72ef9aa8611554f44b","df33b6bc951b0b8a09c6be5e5a13a41caeb4bca8ba07e3113a1ef9ce26f5a10f","d5a38c93894aba8365284e2c86376ba894f2c8c08b5a233376bf9903ad7dc794","7680b0841fe65e8fcfb9696c3985ffba7e0cd27b59817f4d609377a257840c99","9b044da2b6a0f1777412394af2af88609364b4a898823de3ebcc94a45b01bdc3","0e1c711989817095b76e3afcb7a187151fda619859f564e37ae5b5680ca9e991","8d1e6880fbd5e13ac0f1e21b875fa169bdbb8a65449cb7c0b2f9074a1e15e99d","d6d7ec5b8671612f1afda6d1c341da4ab277e6a515ef03b097a08ef2f21b6a1a","8e90fbff84453d26da9a25ba9530d677aecf62355e82abaefcef4642ecd6818d","ff0ce3b59f4b6fff6b806e01d20d764fb2b7a5651693c19ab4bf8a8b5ce5f968","05978e8b9ad5fd39833c65b8b951e8c80cf426334c441fa8a8bff8eb8eeaf534","4543e8b9ac7bd077d9526acfdae449f0a0d5517cbb42414f50ef930ecdb9470b"]
Anchored: 2026-09-22
Public log entry: search.sigstore.dev, log index 2907673729 · entry 108e9186e8c5677a06ea…
Expected log hash: bf9a74000249ba6e66b1e29aae9d8cb95c3400dc118569a80e5c0949f3e8ac62 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":"v1789969984102","kind":"published-quote","locale":"de","page":"theme:vaia/price/de","quote":"90€ pro jahr minimumpreis","rating":1,"review_date":"2026-09-14","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 (b9a08f9d6d76…), 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.