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.

“Sehr schlechte Kundenservice”

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 3240231023

Proof data

Record hash (SHA-256)

4f4bea836b14fbc240c5bcf9532fa9717e9468e62039ef75c0f0540dea8e5bc0

Signature (Ed25519, base64)

FJRMNtvbi/bAQ6lsRs3VADB5dsW8fimbp64XehWvp1uTZsBOwtiE1FJoMpfcYH/EsJIxXEQJxwN7+DEx9B8fDQ==

Merkle root

888a38c73939ec95e6f226dbfb3637325026fcafc5a795aa4e227b811d6b2c84

Merkle path

["4f49b87b9cfcbd1f66c16c06786b5a22051df7b00b0f8fb64d6935391807f53a","741c628485ddd0a074345e785bb7dc638bcff4dcd1d66a53018a9107c2c4c60e","be2e0d90c41f94b24fd9a742a595167a5d246117a97f790f7e602fdf1bc0005f","40a832cf4fcbb80da3d3394a4a264a97651d01f98df79b1ec4f14254f1743874","8e69375f1cf52caece5694bbfe770dd147376fe426ffe9dc561b67cb82aa6bfc","2055356a2342a54907439da3917a8e8f8bcbeded125bd1a12f5b186672fc69d3","d30dfdb252438bcab482def1d52b4c98313d6a15b4526dbf9bc789e536caefa8","70faf5f21c6de8ad5292b5354b4c6b6480614752f73f8b063e150798e3ea50b3","8c61e8d3e2c4ffda2898a849b609b1676e218688686e35ff3d7348b16d1cdd80","a0c12385fbd07529f73a74d44e8c60f38b4b3c20079e32e273491c535be9eae5","83db607e433fdfa67c0c3cdd2e09a24b4773b7db253781d62b43893cfe854418","cfcf82b47bc6a006b7c11e5183fbaa666e00ea4d950e64e1f574bdafde8e1583","410ad2e8ec6f218bef120c1cded3462a092f61baab59fee462fd9704d436d66b","f46648ad2fd9f2769b9fc0ba1c434d2040de67cbd8b7a61df7b7575cd5a9206a"]

Anchored

2026-10-13

Public log entry

search.sigstore.dev, log index 3240231023 · entry 108e9186e8c5677ac0ab…

Expected log hash

bc440cd3136178aee800fe49b9cf2e319542a645c9abbb8553c6ae1e354ce201 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":"v1791860805798","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"Sehr schlechte Kundenservice","rating":1,"review_date":"2026-08-31","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

1. Open the Rekor entry (pre-filled with this proof's log index).
2. In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (888a38c73939…), which ties this proof's root to the log entry.
3. Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
4. The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
5. 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.