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.

“Für mich ist die App jeden Cent wert!”
Google Play · 5/5 · 2026-07-21

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 3138947147

Proof data

Record hash (SHA-256): 1c5732b3908894b38eca4ebf926c996182d6104ad7267ee0519e4b6b9265e658
Signature (Ed25519, base64): ULYgyb7Wj6dpA7F3kqISTnsgOwXE4Yt9CYXTKmzKIEUI/kbYsl4i3j933XSIl9p6vhCB/BvzfRhGuxSpe4g7CA==
Merkle root: 1b26d1b85473caad1868633ec4c931eb970e81199eea87926818f3f1753af37b
Merkle path: ["1c54f53bfbf255c1a108f62597df3fc74c9169ea8efcf4fdf759d58ebedb16c0","3d6b76266c7900256a711bf8375781791dea93ef234a04e49e2865ecb8aa18f0","afa68d0133bb58ddf702f0ccfc09f7accde63487b36ea686703712fcdda8bfd9","e070654fc3ebce40684fa5337185525dc6d91482e0003d57e28da3ff9bbc73f2","49434400b450432bc847935d82cf1d38b899965245efe7452be02b6ac475a2f2","d78b526127bf396c0ecd26bad9f70ac8b76a6efa4c419351da36418512e94060","3bfac5017940a89f5e31921e2afefa7078b4cf76261e64a52821e8de8d7ac742","5f1622d8fa57601b4b40da1e8ff78ff21ea171e8d7ad1398afbf3a8e0de65bb3","215268844a012927963f29a21971d8c245903f8e2d84d9c2530d5f475138f099","93ad060edfad0dbadd702b298934526b7572d88c62f1af7dd0d218e7bbd09fc1","2ee8fdd9f4f407e526864a8ba3702d86f1097bb26b89614052b4ded4db8d4678","3e245e6d740eb81c4f09792f11d7fdad46833a72e13bd136ecc679eef2e69b63","0a715bd63526388883fdeb099e9129563e4c22e6bfb87e7eb3c16d297d4dcf78","a52caabaaff23a9dd211857be614b6dbb651e724ed1f53485e9621733590c1c2","06054c91b82ccf7b99bb6b4fcb7c60afa97f93295e6829b75e5bf1efe9493e63"]
Anchored: 2026-10-08
Public log entry: search.sigstore.dev, log index 3138947147 · entry 108e9186e8c5677a2712…
Expected log hash: 8f66b765b7efcb11dcdcf57b81c46ed3317a5895f5b870638e23b76f1efbb2d5 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":"v1791425549743","kind":"published-quote","locale":"de","page":"brand:threema","quote":"Für mich ist die App jeden Cent wert!","rating":5,"review_date":"2026-07-21","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=ch.threema.app","v":1}

Verify in the public log

Open the Rekor entry (pre-filled with this proof's log index).
In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (1b26d1b85473…), which ties this proof's root to the log entry.
Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
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.