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.

“da die Daten beim Nutzer bleiben”

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 2514013184

Proof data

Record hash (SHA-256)

67d9f2f91147e7bad5bdef028730ff5a0b1a8f49256ccdd645d3c9bbaf304bab

Signature (Ed25519, base64)

vN4cr1yv4uTjycmPpvval2/aY6oobhSxCnisv1r34dX/gI/hA1T5F/AnDOWAxvpMJR9ReBVadPvckXmeaE4YDg==

Merkle root

677e672fa444dfe5152ab91687c577772e13723ca441b5c8063508daedacfe44

Merkle path

["67da50d78202eba0c9db18453d08a795161d80c4d3584d3481f26175b347274a","c5d12e062ebe67d49cb3eb148f5fa11f8b64dec8c758261c76faedfeb6775bed","cec0e60ebeb2d618b3f176452f387e2f97682074bba33129ba58a73acc92b495","85bb922ded7ce1f90ebc3be61c9d8b90a530c7c61c299e2b6a9316539ffe22ae","2a009ad3a701d75c9b0dc997b9ec8a947dc8cf6e2d2cab238d6c8cbb0baa7e89","c8e6d0ed0e02cfe57958951df75782788fda01f7e64daf17bb45a47e1b5f1fc7","dfccfbc9a7f341bf3cc99b6d6948829087718451ed94902a990bda2fafbbe60f","2dc42bf60b6a6bf95f0d48084697f5a2188ef6093e2f5b9a93d4aba74eb07803","af4f2611d9d101570bf2cd1bcc85e2175d10d845fe20add718859a4e9a86a09f","055cdec71d7a801bddfe1e6e91bd7b6d0a33a468ad9a5ebca5d1fdf955621fc3","0b5f81c1397895a67fa0c168f5a03dd82e09e6398e5f4a199ab43883af912889","5999ce9331a3d3c3b42ff68c7d0c3b2938b4aad17e69c094bbaa432c5034da76","ef65dd9ebfc0d3ef62099f320670e0ff1ffa0aefd392ab7dbd6c1c6483d33d7b","3e9df542f4415cfb7321e531014c29668083cb06fd7805d6083ebd6b24fa289f","188420cfe03d9830600dc87f84622c41659cea53d9b8db8954bfc926ce1d4dac"]

Anchored

2026-08-19

Public log entry

search.sigstore.dev, log index 2514013184 · entry 108e9186e8c5677a6b00…

Expected log hash

a596e5a342226b61371cdf76b5c8be8e37a3d00e7ffe8f7b0b550e1a8d1459dd 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":"v1787122978040","kind":"published-quote","locale":"de","page":"theme:threema/delivery/de","quote":"da die Daten beim Nutzer bleiben","rating":5,"review_date":"2026-04-06","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 (677e672fa444…), 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.