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.

“wichtiges Wissen länger behalten”
Google Play · 5/5 · 2025-08-30

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 3240422411

Proof data

Record hash (SHA-256): 45124a56be82663fd9fef17a48754f433d8e41fd4215250c6866c423f3f1d852
Signature (Ed25519, base64): BmcwzRjLHIt5stszjBBHnewhmrSBt6WfUZk2Pf0h5U50mHvBt4I8bVGRF0HS4DDdI9nUEigW2CYr3l0tcH08Aw==
Merkle root: 825dbc6ca55f00c6c81d8de0f7a080bad31b79dfa0e721dee7ded0e9c294ebb9
Merkle path: ["45119e764722d709b99fe9a54f91f2973b967170b18e38926dee3b841f3c65b4","89bf7d70eb7b1a7b044cb2974a9ffd1d37e83307ab6601096fc33b4b59d13e50","f67c3a7dce203ad862d4c7e7106fb808c84f23adc6026eefad20b4d40b5a6029","2c2b74762c5543657b9621044472ffcc95827ba57cb84aaaaa64a86520b9676b","cce18771853205e1a7aee8b07e8499b836826fd304df598ed3d6d5fac1737ada","e66b0aa2e02b2c4c8070e12d60325ef7c0429ef694031efcc5dd4ede9e0e3220","414a7afa37d98a6802b9543c0305366bad3d08e0647bafd7ca589f50355ea7ba","ed6b6efe8c0ae7f18b6036428a2bf79dab83ec0c492ed135cbde43776f984456","4aaee8e2f5176faa89530c5fa5dd66a7800d04394f16b3fbc57dec879e65527d","f819d222e3c138cacb2d21befb04495849ab9f599ca63493ce4e7385dc8a1b87","c8b7d8e613e305123bcaa9af1ed1a7d0c72af972c727013e1367bc0e5df8173c","0526b5b7adf235fca820e27d7e9bb58328407474fe694c840500fecede0e4f46","1e2e9420d8c4747dca96dc342727525f4c47cf2390ef42ad69829fe37156235c","04c4bd8a9ef95bf5648c9d023612bd1f2446e83a6dcf83e612d031a5ea30e90c"]
Anchored: 2026-10-13
Public log entry: search.sigstore.dev, log index 3240422411 · entry 108e9186e8c5677a0ea4…
Expected log hash: 8667b0db28913263098c19cb6387cf64b6d68b1b8f2c4242d3139d96cef5da0d 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":"v1791861703078","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"wichtiges Wissen länger behalten","rating":5,"review_date":"2025-08-30","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 (825dbc6ca55f…), 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.