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.

“Smallpdf claims to be "the all-in-one PDF app trusted by 2.4B+ people for PDF scanning, editing & more."”
Google Play · 1/5 · 2025-06-24

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 3101352376

Proof data

Record hash (SHA-256): 031481d6f94fd2c988ddb7d4751c1ed68c02a261f107670974e6cfd68520465b
Signature (Ed25519, base64): gMrW48N/UhbIMWWNCBlKT6jHp5WlwLPEzJRoKIKzq8ROA9T2vPbitmgm3TQMHgQq9xgYeuctvV8OW4x2AnBJBw==
Merkle root: 3b3dd30c58213ddb8f8368232793fe0b07c54689d13df1c0c41d21cb861abb8a
Merkle path: ["031074aee7fbb037c65a15eeaf6be720fa13be7115da60ec6bbc3087b4afda6f","55e00c6d24bffc57505b6cfd58fd6c3b15937514c0dffd1c06f7f40cc321a447","056f9dd854ae5c40b9504e7170333aa71397ac4f6f609892a8cf7ec18aa5e1b5","60f1cf63f66f57ca3608d9cc9392804614007e7b785fff0ee55f694939568647","5e5f735d530d8ce2efcc236788afc6f482657342ee4c77d19eeffdb9e9f93dbb","b28da9654a98c0cf6b3ebebe3563876b0a2123bfed225aaed25248ee65d25433","8de86e93b720737a4b66e5e6df84d9890342165955095ea926d6ee82647cb891","6d61c977579f6925812f6a3ce6a2f4a138b05ce740b6a21565fc4be4b1928139","7ebca1259bf99df25dcab141466eff6338cd12a30891091f45839909bf80633d","fa78e9e7e6143ca6e84d2111767c7ef17283a1e9216e8bd27e145ff444432c9a","3c178c871904327faf9ba5b90f3dd1ab0f571d7a45d12e87a39df01106784b4f","65013572e9ca7ff9342c630d7f7f6e23f927a73df0240e1f22edb004232e3e4d","63e3f1ca09bb046c49957a888858df57bd60020311126ac2ddcd851f6ec7f10b","769d32038885a12490c9901edf3eea3853f0bdf37913089eb73e34b2c0d79ce7","90aac0c0379b3865ec4b002eb3695dc461bd0aa66de2ac6c660b6e443865b70a"]
Anchored: 2026-10-06
Public log entry: search.sigstore.dev, log index 3101352376 · entry 108e9186e8c5677ae91e…
Expected log hash: 0a3f75a20ca5e11e6fd9d7b6a5afa175a84aab197fa1914018652863a1a64cee 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":"v1791258637050","kind":"published-quote","locale":"de","page":"brand:smallpdf","quote":"Smallpdf claims to be \"the all-in-one PDF app trusted by 2.4B+ people for PDF scanning, editing & more.\"","rating":1,"review_date":"2025-06-24","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 (3b3dd30c5821…), 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.