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.

“i can't even use the app??”

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)

cc3637c86d7bb312edf6635284f1c3b1985456239ee9ef5527a161989839883f

Signature (Ed25519, base64)

YBo9VVSHKnOjbK0cqDhs078mqXorxEvZ0qawJGwVQ8wILl9H3gov3PD2kAw62lDyqbBk3IYerhIvsOb0P3UqDg==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["cc3695e94e7cd7b2170fbf37e4068ea68ccd6786fd905d54b82241194f21cad8","784ead8cbd3c22352bba86687c52a5ad113793faad835b9cabab97c283178034","974312f5d8c429f53e7924660506450edc239c0185ae7b7dcc51fb2219853ad1","f08db3f8a1020f1107545504646932ff5b6b1c0c9797df28a6705f45c8e2e868","8004be53c2c8e70de57673ebb7a1d139b6e9d06d57da3baae6304e2db62e3441","247d079a074064ce0b55cb0dfe79c987240aaf387b03725870162efc1ba3b718","2f9d42b2df7d17d38fbc8a270ddd922ae336267f49166ec0f8e3922814847c48","bf507c0d494dd93ae45fa333fbc93fd0ca7d63ac4632de4661c9263a17a3c1bb","cdb8a258e1b80b3ea1d12753ce407e07e32c702d7fe7a909eea52e6d4f51c823","a42a21c77f0f0d8f54adcb950626a5c44276eef1210ab57b5a18ec668122bdf2","8401b8939dcfb94a48793e7552a885657c9d52892d88c0004505559f51cd6d5a","1324e7f8581b1cc3455b81e88efce3958a5b23eb7205ddfacaf930e32b10bd47","ff0ce3b59f4b6fff6b806e01d20d764fb2b7a5651693c19ab4bf8a8b5ce5f968","05978e8b9ad5fd39833c65b8b951e8c80cf426334c441fa8a8bff8eb8eeaf534","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/ordering/en","quote":"i can't even use the app??","rating":1,"review_date":"2026-08-26","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.