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.

“Die App ist nützlich.”
Google Play · 5/5 · 2026-01-10

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 2525257308

Proof data

Record hash (SHA-256): 132f70d8ebf8e30873c64236e77e1923a94220d0c1d04c68a8b5e363eb4e4d53
Signature (Ed25519, base64): pmg9uFaZcxuoB4na1JdH703fTkKsrTW1kKdL2jBXHiz6IBm21z3uHHwvndLWfuzj2Czz5hByxPCjPwXCgE0/BA==
Merkle root: bdf558524b6fc08556728f259e0f09161d4626349b700d7f30fb50b05a626ea1
Merkle path: ["132d3321bf8ebc89036c76c53968366ad799e91cb35ffdd751284cc798a408b6","b422b756647562fabc01ad45a17fabea15f2d7ae3084e13d955f6a3be7536a29","1fae7fa04242ebcf90437b7a83c1449a643975ebbb37affa11e84e30370c583a","e940468e55da2a46189639c43f295ff5328a08119f2a1a45d3d9d19a1b762cec","10e615b558968ae065084897f78c79a66fde35a41edd77a1f1b5a1127fb8507d","b62f22efae7e75b2ab9955ee57ab256a644e0298ab3d0600c8855e1647a043b0","6613259c83782504aa6781fae6ce2798ff2bca41ea769bff9a2c89bf65e4a310","f39952b0ea85825ca526037b9642e5f7fa3a5310f7f03c64d87cec5612d77c3a","95fd66687dfd5b9484062ae64e17a21e0233694c3c43463272e1f306c84b60cf","ebffd94ad7daaf9b30d15c0b316c1cc3be19584cdefcf7631e90a8d11cec6002","0e1bd3a6ee82ef3f4bd32cc3cb21911dffafe5a3b1f5705025c94551b91e7ee0","6ff816fac4e7f13f31377b74cf43f5943e0f56e713621e1d3de9eec0611ec5aa","3e4c67110315d61166cdf761e41e4fe4e4d0452a654b99f3d445b9ce5a2ddb8a","272c20c9aa4ca1732f6bbe1fe35bf6daba5432c22350d19d21e0e6203fa6e857","7c1f9829e354481f51c5a693ce64e17eb8bee61cee659bdf8b794fb330eb29d9"]
Anchored: 2026-08-20
Public log entry: search.sigstore.dev, log index 2525257308 · entry 108e9186e8c5677ae552…
Expected log hash: c7cb1a1a9418331323cc64d3f101e644ce5e79412d6e55a22a9342e33025b7dc 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":"v1787195935480","kind":"published-quote","locale":"de","page":"product:smallpdf/ai-question-generator/de","quote":"Die App ist nützlich.","rating":5,"review_date":"2026-01-10","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.smallpdf.app.android","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 (bdf558524b6f…), 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.