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.

“something a student in high school can't typically afford”

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 3178600936

Proof data

Record hash (SHA-256)

5a52d50650d8451d54df8b0a744784d4fc547568c65fb4a5dd1d866b542e6bd9

Signature (Ed25519, base64)

DIuTePns22eABGGxzOFdQmpWcZ7ZcpMH9W5FUFJbSjqNABcHbI4Qbi2LqNQvciMvnRG0xfn6uMGZkb3Kn1grBw==

Merkle root

eee462924587f8024361bc8d60043805cf5210f8bd2ef7667df06d093552f9e6

Merkle path

["5a56a4d6aab045407ec982683bdf8ea83bcdbf860a73f269704f7ded6777487b","acaf1a5aa55ed14d74bc231fdad297672fa80fdaab5a9415629e938ce9ae89dc","a8a312068dc84d507a67c930c2dfb915deab7c6985096bf129ca5a37c7c0a5fd","9466d8bc8642698f5b86da6f480ef832e544911b7c391e610288ea509dc1a068","4eae23dcc004081dad48b8b02aab08a0ed220d88bd250e21e2b1d733f51d89b5","b7e83dbc57bba73cd7a2969fee88f415b5a9e36273eb9a1ac564ade73117024e","a7ac7e309181c6fae91c5be6823110b79ad2f8b3250af6c28fcd6183b2b65c4a","704a4c4b9d28e9312e0750077171190bf863deca831a02f8db16539692f22edb","5e73dbd973f616a2c4639b7bf7c1d00c8b281d3da51465d7f138ead209f79c31","14d8c94fc2c1f683db94640bb14161805bf546c4851c89b6fc260f54ed29dab7","a272ea85631737531680457c069a82b977e8daa62af41dc864cba40b587da483","4379fefad16ae8ff2ba5706e6ae4b477d1b2ce3cfd6e873ab8243a37cd5eee04","2a2a0e0a04556444a1f3e56af70f8f7d735501b2d557278ab2ea5948d291f4ab","a445a39a48770a8fbc5d87a405ed660d401fa810eac6fbd1d284a96f8c7d5503","452f4fcbca19997a15e6a6869c50e026ff02cb90a6ef21da106ee0457e55941a"]

Anchored

2026-10-10

Public log entry

search.sigstore.dev, log index 3178600936 · entry 108e9186e8c5677a6a91…

Expected log hash

f3dccf508afcb5e89d56dabc8c5aead85de215b1b896d057d463ea1c1bdb13a3 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":"v1791606586319","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"something a student in high school can't typically afford","rating":4,"review_date":"2026-10-06","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 (eee462924587…), 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.