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 app is very good”

Checks (re-run on this request)

Proof data

Record hash (SHA-256)
b19425731ad615bdb31b4f4796a1e9f002fb7ef45d78a81bd983b76be7d72bb3
Signature (Ed25519, base64)
EwflqeCwzR4JSE9a6NAl0DRz7fVmH+uMeTMAzHcoqJtnWao3z5r56CJiu3pk4seZqt0Z3i/Rt2TMyqqhppNUAA==
Merkle root
b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path
["b1941dc6cd33aacb23c33775a52ac2260c230667f34021324a97b77ed3906bf2","c1a214743e315d2115b74c9bb14dcf0b135b845f043de16c1ac7d912f18ef670","4ff2d5ee6983817d889864e855bc7a3f9bf6cfc68f8250737718a3adcd35d800","8159427cc3f45f899c765596db65f0ee5d70fecac066203df8baf645f1cd8d4b","8e7c4a441450a60a70b92e79fadf4f1fcf1a8156fa76dfc41d29ab220ab93d07","ae457fe0daaf83fe099c37e7aa421a9fcf9d88ca213b67dcf873665bad0ebef6","4773654b49fde33bbf4c3d84061784d1bc30b42146e0e48afec056d990e131d7","545decc1e8c34f1435189e9f7824b80b560d61bf685136ce1aa15500e510cf08","85ff150ff75c780c74f98ebc9eec869687ac295f72c11aa64af2e4bc98bd73b6","aee526ca68fb9c032a3b580add14b26fe8d48f9f145846929d1b286460178d66","302781f826e4e27dfeeb952369e37835d487d944454c4a4129ac11187f525b5a","d0e82af4a03d7591b930166e680788d40e9d0f467d2d9124361d17c683e6610b","e73087a4c89fcbfd62483a37ad723e600377233e603592ed8ad92c5db69f30f2","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/delivery/en","quote":"The app is very good","rating":4,"review_date":"2026-04-08","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.