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.

“The ability to send encrypted emails to non-Tuta users is also great.”
Google Play · 5/5 · 2026-08-18

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 2789279696

Proof data

Record hash (SHA-256): 21d104a7d18cee5cda1d5624502206cba4eb4b281a9985c7e9cd1a58d7bc8bbb
Signature (Ed25519, base64): ah2e+xX1bHGrNVeg9QvBaJKjNlZpx+PkGSiMUcsvihdOU3v4aFRCeDN0k77a6c5+OW8FIiW1N7DchBDD6XsHAA==
Merkle root: 97eb1062a862b99998bef0a84476eb3c3812bb77c2cb927f4fd2933b59da9e3d
Merkle path: ["21d3dc15a1d453e7be34167391cd6c9a1280127fba922ac58430c237b6b7f62f","f1e05c79b1b7d3f9762a52f7dc5a5270c28cf1969361928a54a594408af97947","525f9d9cfc6f8b29ca5e114c5ff51e1adf0500e9d680ef3344a054c1fa78c8c4","f8f57200f62a1e1c0f9b43df979f9916f8307ea0d5752fcfd6e434009754e65d","d1def94472537f835af13cce636cfde6fc10304475bbaffadf0f8beb212d8eff","f248cc7529897690cfaec09fdb159839bf907fa8b4334acdc270e6b7fe9a5793","2be053a9eb7eed087874b990a8c0a88cbc2dec8b70778f2a6c50516e3135b5a7","823a56fbe8ffe901e2a094ab9d0bd78d0290f5e9413f3cdf2a1635795910b6c0","08eab7e70f85e8d72d6937b267c0ab6692eb24c45602d91114fba509523304cb","603e90c154d15d9d65f6bb2e53cfb97c8f3232399795179e7b909e4b96d61314","6ffeaf8c3e10ba4ee4abdb58e6ef1e3f2f184cf2b9b0fba118ce1d00454b6f4a","7fc459298391904a3838099fd1a0b7e635c26503d7f861328c446e440a4bd8b4","5b47260d99d2c4ad6e0d963995c990c8506dbf10eb0b146a116c3fc6ba348071","a9559f2ca8536f2c18bf059f3f0099d62235a93ac35dc17b09967d392b72be7f","01242865574478f13dcf9d888236d7a907264abdb87f360db7db06de0945075a"]
Anchored: 2026-09-11
Public log entry: search.sigstore.dev, log index 2789279696 · entry 108e9186e8c5677a3885…
Expected log hash: 05c7009ecf7ce5cf315c252c2a1dd135e64989a02cacdaaa3c5a87412a2e921c 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":"v1789017464005","kind":"published-quote","locale":"en","page":"theme:tuta/communication/en","quote":"The ability to send encrypted emails to non-Tuta users is also great.","rating":5,"review_date":"2026-08-18","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=de.tutao.calendar","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 (97eb1062a862…), 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.