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.

“Nur die recht häufigen Abstürze der App trüben das Positive”

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 2513802575

Proof data

Record hash (SHA-256)

6fa4c88d902b079d1068206c518523032e6772e4863ca293aa4089909334c00b

Signature (Ed25519, base64)

HnXLEu+08J4U5Oop5UZEfQFxSjwvbzD3YKFCzp/l8KmJimYkNZ74fHxJudrRjSwbLdpn89MIH/ph6Pgoa6/cBA==

Merkle root

80de158564b7616572ca0c0059561f6ec90cd5bce49a388e61df989f3f6f2a86

Merkle path

["6fa4b39a6fd3e8204e88e6195f4747ab7a02d9b671154d049d1225a383f2157b","dd6dd2a5b15d87305766f0e20add8dc27058c17dd5f3998ff4eb9d25ab0aef3b","298f3e252444e1fa2474a3f8c065fb1e83663b3da6ebd0683081221d8aa49d61","eeaae360c87bfadce139fc968405421b6fa7cdbdd7ab87411f6ab89d5e3a64d9","cbacc7b615af5c70c941284c8f060affb2b8003fd0f221f47eb40549687bf5af","8cd5888f7b995ae7bfdcb571a95b3be3a20e86c955e63749bdb2c7bc063b5320","aad8b57d95d85a33d5967f446aa1e5054304e4228fa0a9f185ef67e412c607c7","02d97e9fc692587b7fdd21269eb6bb9d5efdeadb440b6f56dc026a280bb615aa","e5b4b00253c5dd13d4ef11ad7bc2b03a9d86d1673355afc6b8316c03614c133f","badb71a6ed9a9258f45fe9481371f53e9efa057299f4640abf84bd897d6e4172","63fe760c030e1655a16c2d483846165f3bdc19a9d51ec35beb8b3028e1ddd224","fb884b13c6c7b6fa45ec692f0cd19450269fcd13629216d89df8f4f8f28f63db","4030647c2ef4f8e3330609d1b1b8f3b58008674f60e870e605f772c875dc6aa9","3492e7b3aa9fff62b956cd07fc3f980ebe20033aec60bffc5a515ff87c949351","68889fd35b89925b8d265e65260618471cd9c2f5458718fde3d6cb3829d8f00f"]

Anchored

2026-08-19

Public log entry

search.sigstore.dev, log index 2513802575 · entry 108e9186e8c5677a9216…

Expected log hash

5899b5d0ea18fa3c879147333708054c2e3cd77662f2b6f633aa3b5d5512bbe5 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":"v1787121142818","kind":"published-quote","locale":"de","page":"theme:threema/durability/de","quote":"Nur die recht häufigen Abstürze der App trüben das Positive","rating":4,"review_date":"2026-04-27","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=ch.threema.app","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 (80de158564b7…), 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.