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.

“Fast, secure and easy to use.”

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 2514629481

Proof data

Record hash (SHA-256)

ffe91720d6ea148a43d15f9ee06a29a9a25cacf8dfcdea05d4d90acd00739ab8

Signature (Ed25519, base64)

hxPDtThvqGWlozmXt6a4GRIx1+KMRLdOo6wkjEwnyzRRDUEPAiAEvijUTYM7jUqQvSXPWws1zfCjUAU8hJYhCA==

Merkle root

3aa12e5b2bb49befac906908c9a841e9a421f12d0bee8acab9c1f906487adff2

Merkle path

["ffe866124c7fcb36e4c919d58e7c277fd3c2413edfad5fb3c8bb8a37240dcf22","b229f026bf9d140dd930f52d3ea23747c80c6cdb26deecd6ee303ce9de81449a","bce1401a29d365a8344eea7e277fc5dc8ee606d0713b81a49454610d00e73004","fffc828fdc30fba69c489407e8c93f44ea8df9e8db76eaa790da82de9234d6c5","1434be265bde9664827cc36aeb07949abfde90b8741afa66ea4eef644f605a32","2f914f06e6d6b247f41677a0fae2101db4467b3f913f306e1051faa51985eeaf","8a28134c631820d9938e11a9d4c19e9b5a25ad1a4d2bcdf062551b6fcd44604f","5d6850e28ec09372dee79889bb8f26555ed01794e144d7af23e4c235e632eefe","02f47b6d7dad8f32797ca5aba8e2e1f8250e4fab89ca82b067986f372deff6c4"]

Anchored

2026-08-19

Public log entry

search.sigstore.dev, log index 2514629481 · entry 108e9186e8c5677a8c32…

Expected log hash

d923130994e40329302180560c0ed5b43e4400136d037befc932b83910626f34 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":"v1787131980797","kind":"published-quote","locale":"en","page":"brand:threema","quote":"Fast, secure and easy to use.","rating":5,"review_date":"2026-05-07","source":"Apple App Store","source_url":"https://apps.apple.com/de/app/id578665578?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 (3aa12e5b2bb4…), 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.