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 love this app!”
Google Play · 5/5 · 2026-08-18

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 3198489507

Proof data

Record hash (SHA-256): 3a7d7c75763ca4d08ec645090e4c3bee84da884d506c569c86cd1719bc0db40b
Signature (Ed25519, base64): XEOspla/NpcITltkUdxTlGdPZzkmTbdyWlHiiXpqUHUhXyQL5eQJg26hUSbnEyryfmxWzSGRdT5M0qrGro1VCg==
Merkle root: 240cb93491796b59a812f7182e64c43781541345e454701e4066e1786c286494
Merkle path: ["3a7a578e7f70f8e74e5717a1967e5bf56c9d7639e08344a5a32e77c9fe9eaab3","90577e32eefc71c86b7cc87348743daea2ea8c77cc7ea54b93f3eded2a0c3d01","65b8cc7cf664b14cc306e922722765a5b87857f6c9ab511dc74351bfcb18d42b","777fa144ecfcd391335404c0bf6ce6a8015b6a81c0c651de73bff9eb1aa04356","4f0f2356550d45790c455014feb32c617ef8756c28d91410b9652afac3ac976d","543782c5d3dbf2fa0994493136e5105f776e3831553170f62d0e6968da9204bf","e980cb5b7f55eb78eab06c7a014042edcf818919d38bb1602e10e3cda4f0a211","b2cfbc501660ed3e440486d2a5311a66fdb678deec1e983b09c462bc1297be04","3c543ad1a46d40c7b056f94ac1555985afd26d47c04d27165be4c8d55b120faa","5fc967491524dc0ae9826ee91d4e079c82057d5cd18390aa22220fa54e7860a7","d403f355aba4dd2db75e94889e9f1350403fb1a3c8e86c27b49f11976f903f3f","ec9ecaaf6ecd25e70da3b6283bf48b73edd2937bdffac512199306f1e5863dc7","7115b4e40dabe303dca48b39285385aef0729dc23733c818e0f3ca68286a3ee4","0d65160dee55e809fe06e5334fb3150d04f822ce1cb47b2ae30b5d21efdf0eb3"]
Anchored: 2026-10-11
Public log entry: search.sigstore.dev, log index 3198489507 · entry 108e9186e8c5677ae5cf…
Expected log hash: 50393c13ffd4f8ef4c37424a8293b422d8c3ecaf6b9593225e2bb93e0cf2c210 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":"v1791686710415","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"I love this app!","rating":5,"review_date":"2026-08-18","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

Open the Rekor entry (pre-filled with this proof's log index).
In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (240cb9349179…), which ties this proof's root to the log entry.
Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
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.