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.

“Fastmail had made me fall in love with email again!”
Google Play · 5/5 · 2026-08-15

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 3273402563

Proof data

Record hash (SHA-256): 3af179c8b885b21d00a2d10ad5ff25535e45227778bb62783fe92ed75175bc02
Signature (Ed25519, base64): 9LEm4UL1emTBIV/PNeTMUFNTzwvvnRcsqKzNoLty0JQoxiIOAHD7QolfHG7btEIu9iaCOnDWi5YYY5dyWJPJAA==
Merkle root: f157206eaf0681e32c282b6c87b482d5b05edc0371242c4555dfe07a805d46ee
Merkle path: ["3afcfc8568d1a7dfb9f722e0065250cf3e446339fe0e193fa0f2822dd0fb2533","f1ee6ed6edd1f97e3417a22ca1a9b0da13c26269f6ac85a6b756a03486cda46a","1fd9dcec6b22933f13b40255286916730c89c7e8bf0adb86b667095b213815f0","d44f76382a8c6a7356feeb965e307f39af09fd3383c025d4d2ac5f49cfb378f4","3bfe23325c0cbee8f6af5fa5aee204a567987f29e967392d7c46046387675439","5cff8beb47b24d35560910a8ec657be48974098a5607f51a8c0551344e663c65","74e1712888d8793dca9c7226405239de41a96729038ba34227347181e5213956","6121ef7cf969ead5ee441aa2ca1112971e436190cd86dcc72513618494444a85","9d29a4da10801fbbf8202d5693ccfb1490760a68a5ed138657881c0c65b29fd8","4bd0528c8f9f92a0f59ef724cc6fe34da54b5b51ad202568c70bcf14212a2c5d","4686d8c7e2fa4564cda06282d5ad234d2b094ee36f7380cfcb08723b7d459221","ecb9473f3a1fe419944f24e69a30aef8c9a1ac3ff79c3efe405743246b3d6703","18d3f68accc8835a5c40f0c374bff5769347a644756ac8ed830a1459ec4a0187","72cec015fa128b419dcf741d3ca687936e9595c259ab78dfd4256d8340270e61"]
Anchored: 2026-10-16
Public log entry: search.sigstore.dev, log index 3273402563 · entry 108e9186e8c5677a6df5…
Expected log hash: d39be9954db9139b182dabecbcfa2b9510337ba2b23ae56a3f9ebed18578385c 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":"v1792122859337","kind":"published-quote","locale":"en","page":"brand:fastmail","quote":"Fastmail had made me fall in love with email again!","rating":5,"review_date":"2026-08-15","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.fastmail.app","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 (f157206eaf06…), 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.