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'm almost mad that Fastmail is so good”

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 3240422411

Proof data

Record hash (SHA-256)

54ce3b2347b417ea970764ece9bd6e81bafc9000fe67c5524e2c3a17e4e4618f

Signature (Ed25519, base64)

xbrDtaYi93X1IXiT3DbYa0rzm3bsLxLZT/XFoOIxWeAeawS3909DcSp1SMgbrlxWRqYB92RSWUC3STk9CQR1CQ==

Merkle root

825dbc6ca55f00c6c81d8de0f7a080bad31b79dfa0e721dee7ded0e9c294ebb9

Merkle path

["54cd56737d14d7c1c7484d8bad98f9a99697fcc9ced28fcdce2bffcafcc26485","6f4ce4f2e7d47d9b9a8fb22c0dcbe2b222aec1034d39ffa4a161bd7028b3b010","cc65dd5f9b524262a4cb8c44a572da059172a3f44ce03bd78b4bf45b0c572afd","f2ad9dbb5be14bd0eb10dc4e918d450c8f5be043f57ac707429982155cb3b3e1","213c2421fa17b1ec0081af4f3f7f2ec2a7f664cce9931e861a7f1d185c76b7e8","2c1a13245db22e39a3000a8c1f43e223504fc335443b9badb8950300b234a98e","8e3240ffb9c1feadf595fdad8338450db7f9939ee8dee6d3008b252c7927d153","2a4acec2ebffdfd874bd5d415da2560507f8561950c06ca1e525850d681df065","fd5c3d3ac838e19e7b9a352963a7600555e9e63c5cd3c9632b1de97cb64142f8","d7e33ce88bd04522c9d3cecd828c2da64793cf9211100057a63b7ead77f85c95","c8b7d8e613e305123bcaa9af1ed1a7d0c72af972c727013e1367bc0e5df8173c","0526b5b7adf235fca820e27d7e9bb58328407474fe694c840500fecede0e4f46","1e2e9420d8c4747dca96dc342727525f4c47cf2390ef42ad69829fe37156235c","04c4bd8a9ef95bf5648c9d023612bd1f2446e83a6dcf83e612d031a5ea30e90c"]

Anchored

2026-10-13

Public log entry

search.sigstore.dev, log index 3240422411 · entry 108e9186e8c5677a0ea4…

Expected log hash

8667b0db28913263098c19cb6387cf64b6d68b1b8f2c4242d3139d96cef5da0d 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":"v1791861703078","kind":"published-quote","locale":"en","page":"brand:fastmail","quote":"I'm almost mad that Fastmail is so good","rating":5,"review_date":"2026-08-25","source":"Apple App Store","source_url":"https://apps.apple.com/us/app/id931370077?see-all=reviews","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 (825dbc6ca55f…), 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.