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 3140475820

Proof data

Record hash (SHA-256)

d598402216e728e032c2b3782a57523013e4bf8fbc5f95ef70e9ca973b240911

Signature (Ed25519, base64)

nACZgxpNR53h3RRRRvqh/RIyNemWfV1oOrgOIZ+dfCvrSbmIADcGmVwQjyu1hLKi+SlwERj/zmIMDQT6SybhDQ==

Merkle root

52d6be1abed15ebd0724a0e1a493d5805e1ea49ddcaf8e9e5584928cd3e4d759

Merkle path

["d593129acb52d8ccfb56e8e3008f85f80bd8db159318d95b32d0412eeec25bdb","4f51517def72c4e7405970dc35c2aeeebf8d1924ce5c7a1f5f6ac5818d870c11","3dfa915ae17b0c5224b8597ae4c6ce17b048a618458ca9781dd0c47f360c2d33","31953918643bd71e7e5f88e9acc13f8cd2c6bd40c68ab0b8f3a6741060f65288","b66329226fb93e9b85687b09a36cfeb5e7581e99b1b270e557c09add18af6356","da015bed2b143ee11a1a54ee3c9cb3cfaddaf5d01e7646f0b4b268035fc223a3","cd47b84d828e90fec4e76f785661d70dfb37edab4bbebf835caa851511aff3f4","2f6d3a94d2ad14f8b46be79cb4cd7daea7a9d3801eb0726da40996d179b21f4b","119a84b1018af7239aef1fa3f7e083dc52cbca7600880220cc822c2629fe4820","395f17bbe96f19487cf68ddbd2d654924534e535707f9b036c9c989386d48ba0","72cb136d71213259e44f69913bcfcc0739e1e19e07cd821761574f62999f234e","8e5b5f164b4138fd16cac15226197ff2d995652372ffc88c306415b74fb17312","6cdaaeb423ac3ca9e71d9b6b7eb5dc348e1fe6f5917591151d442780b0e12a0a"]

Anchored

2026-10-08

Public log entry

search.sigstore.dev, log index 3140475820 · entry 108e9186e8c5677a78c2…

Expected log hash

bb68bef30792bf00f645df162a48943f770bc3f026216a44dedb4651c8ac0917 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":"v1791431489246","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 (52d6be1abed1…), 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.