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 3139760477

Proof data

Record hash (SHA-256): e7313169beea996f803357e6d9fa1c8680c4f10681a6c660d26823fd5d0837d1
Signature (Ed25519, base64): VIXJe51nK1Ukub6MVbFhvy9TNZA0N8b+vPX/4k2r0UHjz4yEu0ARfwUbA7ZXdVF5lFRBGMSmyhiI1JSCT4x0BQ==
Merkle root: 49133e6803d24035baa1544a5c730db93dbaf832df48f680ca855944337404a2
Merkle path: ["e731512ca8646e130bcbed911c006005ad940caada07348c30bb79a2fecdd105","38c0bcf1b50dca4b24ec5fe8f525b7c02985d734373b86dedbc09f72db4de183","dfe1685a86f84ce5121eae6f2b280917ffd1c793e9edf3e817e77e7b0fd066e8","4ddabf142d26770d61ad0ee5f95021ab9b8fb9c68097a4939de54304b592cd3f","eae8270d5c66e8a61b5184be47219968f814cdb664700b860eefc6a04c14c5d8","39fe39a8acbcd067923c2f8d73cbe0417d47f779d9441fe923c4bc694bcf29cf","8f72e511c7810cc75423fb60a2ed2084cb860134f67d02fa67a78a2c7d3f5fd6","73d4e531f8769da463f25de25232bec834e119edd6d2c2a66388dee4775a7057","9fa82660fcf3f125d30a366a1ae34314f7c864cdd327d42ba983663a2ac992cc","a46d52f5bbff37b43f19214e7b99f0e321edabe16b33836363c832dc57703d56","d3dc20716650f839c9eb217717e3c8f0c0b2479172a2479bc6011ad7701ed7e6","3cc595f5376b7c6152362b2175e27a950acbbbf3965898d4ea5be445e3165082","573e30281798543ac2707059ca3c966f21958c0a972fe6cdc3a54117b3829e49","1fef2eea1ba7233240a645d2d99dcdcc4e3841bf30f06929c9f12592e46a0c14"]
Anchored: 2026-10-08
Public log entry: search.sigstore.dev, log index 3139760477 · entry 108e9186e8c5677ac88a…
Expected log hash: d54b6e5e20903e9be29e6a5973227ee9b3dbe61bdc0fa6481a5788472cd5976c 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":"v1791428432986","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 (49133e6803d2…), 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.