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 3668590798

Proof data

Record hash (SHA-256): 21ec6c942636a460da1f90bd67acb4b90ac9046253117a3e31aff1ba7d5558ef
Signature (Ed25519, base64): O1O3THpE/MCqYaQVisdTgrzjFTrExYb0ay6vK/HjQBPZog3Ne+sqeeqfRJTlusNULg4m4bGRV6qgrwSfxbXhCw==
Merkle root: 2d5c5745bb08542103114711fd42d520689060248b05b87be89b8ac779cb9fa3
Merkle path: ["21ee56b83446cfb54b6d713f292a0f8ec308eef6a40fe8c6fec052d9af2d4408","a8056f917db4f760b98819123ed1c5a975c24c6db7496126595299496bf353e3","e13b781f7ca3a3c37bd899aa9e883e6d9b121606518ea17eafeb932cd7b0f1f3","060cca48cb3efe29199313f4e8e474fe4ebc2cb4a0a8ca29adebffb00b9c1f2e","0c2a63badb516bc6a1eeaf1e4254a1384e6a8db30ec1780e3e4fec718d7be4c7","2464aaa75227b35746f8944b254c3d9f470d1044c36849c3e57ad1823927f4b7","cd0df5ca79000f2faabff336fb1fa256f162018bd822e32467f0677a756126a2","9e8bdef4714cb5babba098c9f58b3b1e4f26397c02ee4114af2c7d6f5f93d83f","b13018cb07ca59a29c3673edeff6615f608b704b5dfa07f3d21612a3d117e5da","30a3b6e8295be06276352acfa0b1772a7434af3b313dd0697d744354243bd62a","af1387c92e45372a65ca4bbe31c4d5e96d8e18ae4f98d629bfda93177bc39dbe","d2e7cb1decb48678328a01c0cf84963af42024b0e7e340a2169845cd083c64e3","6559cfb6e02d82e98b805956e4adca3f29c70eccaa9b705ec81b278c9da83d06"]
Anchored: 2026-11-03
Public log entry: search.sigstore.dev, log index 3668590798 · entry 108e9186e8c5677a31bd…
Expected log hash: c5f232b23a7a0d0b1f2817c4d619127f695b0afb4a7021ccbe7d935023a45c7b 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":"v1793706397400","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 (2d5c5745bb08…), 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.