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.

“Super, dass dieser App so nützlich ist.”
Google Play · 5/5 · 2026-03-20

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 2621505474

Proof data

Record hash (SHA-256): 131e699ab44234653c3fd116dda4a185267bf61e86008fabcbedb0e3684609b1
Signature (Ed25519, base64): KrGr0pjX6thhQXl8MQZfG1ZFWzjh1d5KKn63YK5gH1uwRM7od2ZkJyRWLFJ9/reZdxArFZkRAKdWBVCJVTIeAQ==
Merkle root: d07487a7d8598747d5b143d9a16722ca7a83f5bd36bc79d5bf9130c2672dae41
Merkle path: ["131f54e896dc72a1a9aeba200d474dae2d758854be53b18daf6dbaeee7428ac9","7b7150961b24be0e395d41958ba86cdafbe303cc361bcc1e2fe6cf9ca84621e5","a9c33daa04b18e8ed4b802ea9371d6bdc152cf4c49664d38ceee7a8110e2be8b","174726d125afcb33246a9d10ee33249ec13ccba7edbc8d03ea0e7cc6351be630","dc624958224e022a5f4046766d2d39d7650117f0bf6a43926459f286feac0355","a1cb8c87bb5f1cd68a5252b099eaf0e8348a5d9bc876c65dbb7e4799e6898880","0f3bf290f20b96e7fc04a64c34c45988ec84044182cfa45f44e7f595ae5e5cb9","757ccd993fc34eae33ce68c13da86b495707901eab8ea860d8c789b36ca98e7f","a6167698cf381e5d81cdb23fce008b512914640220408b3a2abfcbeb1ff071e0","163814efbce1ed83b6ed88edf03e6d90d8611405cfa27305f323306bd8803e5d","51e91757fb79771c7c3e7964ccc1e1bd4c83f91fd12f988f28fcecdd9b9fe112","a0fdfe7690d005e054fb3a90a34d7cb5dfb00910c185dee375fbde390d3c55bd","884e6220e81a9d5982bd71d70ff9eeca2e340f53981f663fa0ca7490cce6445f","39aaf77ef5b3e4cffa994bd58b84219ff7133fe1d71c02bfd8ea2a47d2f7467b","fa743bec0c13730c5e9e6be51f1ac48c3e9e0953b18cdf4cd6390a132151d0a5"]
Anchored: 2026-08-28
Public log entry: search.sigstore.dev, log index 2621505474 · entry 108e9186e8c5677a1258…
Expected log hash: 7fc4ddca6f65b68d7bb8897b96188547f56c1ba672ff212c685cdf4bf7438da9 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":"v1787887633012","kind":"published-quote","locale":"de","page":"product:smallpdf/ai-question-generator/de","quote":"Super, dass dieser App so nützlich ist.","rating":5,"review_date":"2026-03-20","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 (d07487a7d859…), 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.