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 3199295725

Proof data

Record hash (SHA-256)

27676447218ab799131cddf4ac91df971ac5679cb06bfd221ef5907759a7a2dd

Signature (Ed25519, base64)

QSCfY1lmaAsdWDIzKT6bgWQomMk/CiSYjB4kZ1OtgL3n7A+9DvpyJHY2M80GHmmum7S+mLXhpb1aJgPG+Hk4Cw==

Merkle root

cb5472fa7b7f10b7453a4f782a38c5dbb3d782ac291369ed3830c2ab783a230e

Merkle path

["2770d626fb701e64865092e55d78037839bb2bd7c12f2ccbc3e58158f60511f2","e7ad9c1b2e3a78fd24f2841230b3000314970186fe4acf21d9d0b88c220d3c58","dca8ac061061e3e24a6524b278105711e8b042b48836f087998e712e479b7cc7","c85553088b37e0297593814ba451567a8243edab0359194c4275ee8882841e3b","2b8502c3017d2d9e9f0294ac8782d19a2467059eb16830a0408b012911fd5ef1","01fa70a6d1ba4cb8cf068101bce6b6fc10ceeb2da0d7e00ddc43353812da0efc","45ce4e4614114245be57343a64b3aefe38e71f948960a493f9db27378029bc44","db4cd52ee96f9cf6cfd66c1916a9ed37c7e90a07e2f861557aeb7dcbff765315","725ea9594061d83391cdbf107665eb1e64e177ac9fc8ac24ad7a47d42be93e63","1c02cdaf205daaf1e303ef8778be3bf8b57cce761d41760ae7c7c83f3720843f","32605f99e97a9c27d880ee9461d5ecb5547e8e9e8b680833e4a8020a3d62fc6b","6b52b30eaf5b97885456e54aaa839ef0900f8bfbb260e6f22cb33aec9a4c66c6","67ef19118472e8cea8d8f9c7960df416625b46d91fef63f2cb0306cda5833746","6ab0f07aea38f551fb6ed4456f21bf7c468ab54859dff87b6772a51601755f64"]

Anchored

2026-10-11

Public log entry

search.sigstore.dev, log index 3199295725 · entry 108e9186e8c5677a3fc5…

Expected log hash

59b8cd8284c909c35d85f443b6a086d482f8b667c56ec942d663937a75e25638 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":"v1791689736846","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 (cb5472fa7b7f…), 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.