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.

“Worth every penny”

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 2515282333

Proof data

Record hash (SHA-256)

662cdadc574ccf44b9251e52d3072c26ca12843c21f5f952868a5fa32676f747

Signature (Ed25519, base64)

jS0AwTY9BjHQ8BbCBcibEk5d16MUkj42Ge8oKM9cEWuLK0Exe5ajcd5yx7I+fueubqf3SJlgE1EVmzpod27cCA==

Merkle root

ccae92ceb3dcfba104788424188fa34a8cb1410075ff6c1a21fa513e89f0c4fe

Merkle path

["6626f5ca62eb31b324186e8b56e7c328fa5b98b071246bfb175efb002f749d03","70a57a608ce5d9900cd970494ea77f919f39acbf8e926886ec2d5cf468903415","8abad4b8481e59e064391b54943f4979292223b0a524caf12855b42949cf016e","02e6defe06b6b97f4b13bf236bc7ff52e8c19f3e57819b6cd4625caec641a8be","e47a818f22432b75662e2439a69bddc9ab0faab57001d4ced7bf4ab169b4ca27","a29e54c6141cacf44366590bc0cfbccd9218e41b29e853ff17232f6e844b8a6d","2bd6063c5c908e7b58d185d834bdd5eddf7231a348de72dedc56936285162c48","1959d75d185f9c402ca96f01e61ad4a4dd64e780b193fb600af220eaa9f149a8","151df2f668b59cd084d1691c042ec2471319410e65baef2a520e996b81713ff9","961c17b2a1daffc0772c4e630130b5c5cf5c52406ea5b5db0ad8dc8d62c5ca95","c8f92c5483e1ed0d2ad2a19bb44ffbac4a439d62b0feee55b433d2a06330f826","34cac883526e693549080af2663a642191eb446b9634aa864485beeaf771fe87","e472864955793aaa2d19219057558dc2b6f5214abf252963626c32870bd50cf3","35f1bb6574fe343de1c8512e58fe7937cd8ac075d63d989ecbfbabdbaf4d6344","f73291c2ca924ce4b3764e4b6ff1da65a701069f04fad47c52c8b693a0ec7e41"]

Anchored

2026-08-19

Public log entry

search.sigstore.dev, log index 2515282333 · entry 108e9186e8c5677a6652…

Expected log hash

af455e73500113c158c8df9793eab703ff863c9c98fe38560752c9a1772810a8 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":"v1787139531268","kind":"published-quote","locale":"en","page":"theme:threema/price/en","quote":"Worth every penny","rating":5,"review_date":"2025-04-24","source":"Apple App Store","source_url":"https://apps.apple.com/it/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 (ccae92ceb3dc…), 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.