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.

“Es hilft dabei, sich in kurzer Zeit auf Prüfungen vorzubereiten.”
Google Play · 5/5 · 2026-07-14

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 2904877428

Proof data

Record hash (SHA-256): bb7ebbfc4e65353d35c1fcf872cfc05ba67ac81e4fe8a9c8db5b7b82a2661d8a
Signature (Ed25519, base64): +V1VoRjrRZjlEZnFM60JjdrswpKxCdmmOGy+xS5HAkU2xercBt6JfNcVdzYSFUGfCsTsazarhhF/m6lt4kRdDg==
Merkle root: e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef
Merkle path: ["bb805105218cc7fa750412cfb2dc4e8da6de736b2fc2f58c13d38a847b0445ff","930d91dc1b7d3d5c27e267ea6a575b008c8b3abed9c3064d7202a9f353239bb1","dee68db6871a7614e29cd74c124bd16cec81cbd10035034b19b012799b29fb37","92b79e0ec1ee6a2674cca07f5cb7d6d7a39ef88cb94e0dac6917db4ea119b297","a2af2d7b56a5293d2431a3e3c10d0575827977dcd6d475c60b22ea96f0c75b6f","95d695e3bfc7a3863d5e98f17d6a6960bdcc344314bf8397022c15e239cd3aab","799e850f07569eb1a71c7a8ca169b5a5526da257440bf8c20a4ee2210cdd1662","207ac7f4e4cf463b8b25163b249489545819e2df859f06c0da65828fc30e2f05","cc25481bf9ac7e0e70e4c6e4ca76d0929cda0574e1b0bd57905b010b09330244","b2b50bfdb272cbdd9b1d73312ebc06ef5163e463135f176505bcaa3e4df4fce0","0fded0d410956042b9d1acf691c64135a230864a49447caaa2620cc5b48c956a","1b051bf1ff36589fb2c3614b917f0b7f052e466f644868f148d61dc06ad499eb","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":"Es hilft dabei, sich in kurzer Zeit auf Prüfungen vorzubereiten.","rating":5,"review_date":"2026-07-14","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 (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.