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.

“jeden Cent wert”
Google Play · 5/5 · 2026-10-04

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 3198489507

Proof data

Record hash (SHA-256): 29407ce54bef8c9f3308ddda7fc978d7b08c5c29a761205c680589620aad8b96
Signature (Ed25519, base64): bnkZcqQlajooK/ty+ET4evfReHebU8M5Z8nIHxajBml5Sexs+recGrgYYI1MvgJFMag8ZAODh5iMXXB6FdcrCw==
Merkle root: 240cb93491796b59a812f7182e64c43781541345e454701e4066e1786c286494
Merkle path: ["2939f18565573232d560ca8cf02c80e84d968a768026d99ba29a2d1e0af2ac13","c1cea9040f7124a91b0d4b998ba7ca488b56c06d3bd468901eb8325ed2cfdece","986948598effe6618b6785b56fe9840e73c75f6b9595bcee8acabc18977e3102","d0c9a0d3d89dad835970162e7fa18f6b8dc7f9d7fcc9b246c6ed39fc4819c175","1cca871a855ded29770664df719acaf874169f2a29e81d752cc00627ee6855ca","7ad1fcd259d2bb9b9a202d4cb447b0caab96c7b5aea68c1d6722aa9849c3f302","f3919bea145c72a57b5c6f30906259eb667c217ca271f650c26e6de0f8e0dde0","f743ff911d6729cc2a1dd1918b50b78498a856aea7d461cc3de7ee11c1455f8d","5aa705b64afb1015b7574928250de9218aecc2260c07f6c355ed1df40a643395","f29fc0dcbf03fc7ab3504689aaeae750b894690b76af7b77c18cbbeb2534dcbc","5875a01980fab1ed428afb1225d64357cb880ae3126d5a5d3a8e239ccb3e8480","ec9ecaaf6ecd25e70da3b6283bf48b73edd2937bdffac512199306f1e5863dc7","7115b4e40dabe303dca48b39285385aef0729dc23733c818e0f3ca68286a3ee4","0d65160dee55e809fe06e5334fb3150d04f822ce1cb47b2ae30b5d21efdf0eb3"]
Anchored: 2026-10-11
Public log entry: search.sigstore.dev, log index 3198489507 · entry 108e9186e8c5677ae5cf…
Expected log hash: 50393c13ffd4f8ef4c37424a8293b422d8c3ecaf6b9593225e2bb93e0cf2c210 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":"v1791686710415","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"jeden Cent wert","rating":5,"review_date":"2026-10-04","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 (240cb9349179…), 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.