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.

“Really a simple documents, pdf viewer and annotator.”
Google Play · 5/5 · 2026-05-06

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 2542443729

Proof data

Record hash (SHA-256): ffc507f71e7c3bc96c6201c3ccf79d1f182991f9e9c4e450091b37afdb0d0143
Signature (Ed25519, base64): hDNfds10ZGK8XY2T8wYvCTDhO68K5VdO/DJCxyOJCZJNO+5LfahHDlfhRyhIzTfcneWcTsxsahgQuql9pqmFCQ==
Merkle root: 4354cafe0e2ee66c200238a4bfe005f997e761de26d9e528ed6c12dfe1b33129
Merkle path: ["ffba61a19a5422b2e39a78fa9647c35923079afa818b83b8c7f50ae18431df44","0b8aa162a29728e2f211e4772cead8999a7d1e6d7edfc56075a683475cc1de3c","96ceb0c909c3bce90ef74e3f2acf32fe29acfd157979ac6658906cb933553987","cea42cd7f085a9322b512f9e3cb7ca06ab56b79381e04740d0d94a486f96e4da","8f5b96167c82ba48124915de72774cc30f99618140ab266cb35b57b1a4801af2","4590709be5737b9dfddb82ac6c0d18acc13102417d44cc2eb587b7786821e90e","c3aefe3e1ab52d87c4646ad7b06dda532edda77a1861c39202445705f2310161","2697c4c38a6fe1de55e2899f9e8a9c6c86839abf2d82585a527cf6a82e2a0df6","3c8e98bc315bda21decda991d8aa3a524750975bac14c2e5463c889e2f3c9437","4f746f72cfae819ad9f244ee90ed9273f8ea83684e51913618a036c86eaabec0"]
Anchored: 2026-08-21
Public log entry: search.sigstore.dev, log index 2542443729 · entry 108e9186e8c5677aface…
Expected log hash: 1f12c9d846c7a9fd8aeda84057eb4d8f639bf78886a62c6290a2a60cd48e0812 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":"v1787280389476","kind":"published-quote","locale":"en","page":"product:xodo/convert-pdf/en","quote":"Really a simple documents, pdf viewer and annotator.","rating":5,"review_date":"2026-05-06","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.xodo.pdf.reader","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 (4354cafe0e2e…), 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.