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 3241341297

Proof data

Record hash (SHA-256): 47165bddd3d04ca54f6461e7ad1a85072fdc85f7708caae0884f1da5faceee18
Signature (Ed25519, base64): WXTCVrJEnxM21F1khas94YMaky3n9KxSoJDDdFCa/cMHhdv+xG+W44kH30xOI+5MP0o/oVlTFRlN8Qxwxs9/BQ==
Merkle root: 4900b1080bdcd3b4c9234f01647614e7004e0a1ae01ead44968e31abeab33265
Merkle path: ["471937d37650ad55db66bd47bdc69febd7250137b37d4238d2d8434798645b24","28dd04fac3e4a390004fa6f54eaac50b896be06d8c8b2c0d5438dac2cc9a7e4f","28d310f8bb4950c5c9e4ed42db41c3d8b1fb0f87742751883423a90d61106b32","f99e3b152e3cb8a07eaf39dc4e6bde2999d503ba9a161d55864e1d237afc6955","8c20040cd3f5cbe6d70dba403afeaf0d828e201c358f4deda8fd25d1164bb2e5","ca1639fff46e8edb1d9053cb00d45e0280fe3659ba9d79ed593016d8613ac62e","465205f9830cedb3e34feaf7a457e5043511ebab8fd5a4b4647052b0259cfad2","686d1c5090be5e67c7b8a6dd8244dd52995049d126a803373f3f329d54ac224f","574e8417f801088469d97f9a239ebd3c2f28c47ad07c9e7950c86bae5bdea9f9","b14f040c619a7b536394ce1f65e7df3fdb31940c94253761eb726f3abd5fe045","cd3e9be594270f97347d23985c19ac899631a6773a3076c34d54ac880cc95482","1a39eb8110f60cca7b5d74c4b4e1ee494aba4bfcd1f4082136542cd2a427ac26","acc667d852c71a0e84a086ab20f7bbad3d8ae083a1e44cd20501ad641f662bdf","0a4842003c61f69c5923b6aafd56426e7fe934e483f7d15b620c07fa61f89152"]
Anchored: 2026-10-13
Public log entry: search.sigstore.dev, log index 3241341297 · entry 108e9186e8c5677a0e53…
Expected log hash: 39342fbb95f8cce5be4111719e5450984494edcdff99b8bd9a5c0d2303b67943 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":"v1791866192176","kind":"published-quote","locale":"de","page":"brand:vaia","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 (4900b1080bdc…), 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.