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.

“The handling of data privacy is particularly disappointing:”

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 2907673729

Proof data

Record hash (SHA-256)

de510895f191743f2e216ecad7e21d51de8815a6aadb4f6f5b386c071247dbb5

Signature (Ed25519, base64)

YAJdYeGIRRETtVIY4m5iKxakz0yZZY7R1QcCkTi4+SYXPinoscFrTCy8PYIEVkySmcHzEats9citrJ1WKJUcDg==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["de51543dd599fedd27be408f6d9ec66c564b87e5c49a9349a50997c1d13059f7","24f04e4c638917f2794c806080fb4c94b920af82fa55f17726c2b5b4680122e1","73b939032ea80d02f9574a72ca7d7607d42939370509158426da8ab179bd18d6","8ec6bfda7b90ec17cfb24045d7481313de2b56b05e4ad3be230eb693adeaed09","6e04bb89d84c2bf85981969ad6ff98ee3c87ffd79569c68b4deefa309c925109","10903f2db3687e162b22e99e57ff42a730f3d53c436d3e142ee0178569b15ec2","21cf28bb69c1c6aebc49865e3be66584ff3ea52c2485b098f1df8e6c50b521e9","a6b0027db7ff514272dab70eed859a7a0d01a18d286c29469ba7c5f004cfe4bb","b056b69a3e8d4124a2a5194bfe4f0836fb041500d6a9fb0a540d05a236eceebd","f18e99ba7a78a6b565d7d78fe31bfc86a3092ebcdf35bb1810c3397e6664a935","d724de4db852592012d7e350c865d36fd56f7f3bf918292f4d807bd4b562df22","2d0841904d905b327cb803816e73e56fa86447bd28a90f792c27c874ed9a6b9c","c975f4076f62a76765a4bc502e988829db65110a1650004b828d2dfb5f90a9da","f92a7fda99af63eb008476cac47b147880eec6868f847624f8b438c917195408","4543e8b9ac7bd077d9526acfdae449f0a0d5517cbb42414f50ef930ecdb9470b"]

Anchored

2026-09-22

Public log entry

search.sigstore.dev, log index 2907673729 · entry 108e9186e8c5677a06ea…

Expected log hash

bf9a74000249ba6e66b1e29aae9d8cb95c3400dc118569a80e5c0949f3e8ac62 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":"v1789969984102","kind":"published-quote","locale":"en","page":"theme:vaia/service/en","quote":"The handling of data privacy is particularly disappointing:","rating":1,"review_date":"2026-08-30","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 (b9a08f9d6d76…), 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.