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.

“wenn das Gerät verloren oder kaputt geht, ist alles verloren”

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 2515033577

Proof data

Record hash (SHA-256)

75cefb749c082a7afafaed1223deb2a9c7a3b7623aa4d88e88253da7861b28e2

Signature (Ed25519, base64)

GUu5HLox8qNDVDau2F0xSLSM9wMjk0mTUg5/bPC6jN8sPF6WVkknUs06zSbx2R163GVe1yNiUidwnBlemS4SCA==

Merkle root

62390602d5b1801b2c96dd61074fd5810278db65461e368ee19c9bb147d249dc

Merkle path

["75ce11152982dd97c1b250f702c56345deaa165623baabe50688b99b497653b4","e7f73b70fa74a85e7ea046e0d45ea2c98d69e1137a39a8c3c867c020ea55918f","bf488ab8ceef88334592953b6bb2895af385aa0c1817b2b456bc5ff0203c268c","585b2c29e3589b5f08c20627e025db9649dbadfc8f4db6c75c8c167faf8b665f","8acea1921e9fc688ebddb99b6f5a2435a9341bbb7a8eee11a9f4f08d25b972d2","34bed614c0418a044a0fcba566ef9887ec6d5aa4d091b95a97d203b33056fd75","edd2b8eabbc7bc5a0490c6fb40b93e101a2ea97a50c68d35c538224ccabc61d7","a70ff9ca0430178143f1cc02a62047beaaf0d8febe31697b1e45eae978ac1ed3","8cb577a64fc89252b5a0a4e537f7ed30c715bdc2451398fcd422a4e35f5ecaa1","8782d81cf45d426742ca12fca166044f93e6d79ba9ef36ebee0104ac30c294ac","c711e55b29ff4ea72d48165eb6f01dcb1e884e466012d224c2f215719c61c5bc","b0dc0c20548098133de3f9452c9e18550b81c81910057c978f584db23dcbfca8","a5b0f88103dec63c80bc1707eab835572838fff5f43aed265827460436ca21e9","baf7c3a9a57269bbb0661385ae981f5f3219ae8da84a7502572e283df3bc7435","9092fce07a46a5708f071a70ba5ae2d3ebe27de5e813ea1756180e7747d7c5d9"]

Anchored

2026-08-19

Public log entry

search.sigstore.dev, log index 2515033577 · entry 108e9186e8c5677aaea6…

Expected log hash

458ac564101d02a2c8a5f98465ce4e920300682f0855e017234ab870c48a16cf 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":"v1787135948936","kind":"published-quote","locale":"de","page":"theme:threema/returns/de","quote":"wenn das Gerät verloren oder kaputt geht, ist alles verloren","rating":3,"review_date":"2026-08-09","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 (62390602d5b1…), 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.