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.

“I have to buy the Pro version”

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 2682592437

Proof data

Record hash (SHA-256)

09a666459f67fbab38a0881a87678b4a7470afc013a177d25332ed475772146d

Signature (Ed25519, base64)

f+Q3hjaiuTalNuIc/161gGrjALqYq7aACNS4lCtN/lEr1VmgF4fkBzE2eCmVXVdzY1sXJA0Y8IoK3k8VXGLpAw==

Merkle root

579ce28fe2708bca920b52a6c28f3fe167f796c34475f556d2646d500467658d

Merkle path

["09a23f275d13b490a5a3146e7437802c5908a30cc955e191693d01d66f44ad45","76422061aaf823323d088619d4ad7ac0081caac071fb4c0d15e5b769bd13c44d","06fc4d6ab0dad6026c032241704a11a2ddcb84a71a8f44cf5b74675d10f96b2c","2f903dd4f055a9d7c9473d28919f93c2c5ff97482a4eba2939ea6448485b0f10","59857602f10dd628eaa63c0a0d1c1f3c6f98d1632d43a39c82dd763ec6ca350d","2119ba038cba201318bbb83dbd9ca86f3d9fe815f5f416f0a5aee21d7c8ca58c","e42afdc45bc590493e689fd090b0c9705f2b18c8111aaa237e103ec3376d3b62","b412fb8dd4dfdbb9080815f45d180579754b035ed372f8553df849c7ada1eee4","adc4fefe50c714ebcd9035b6b99794bd2bc7293cbe2d532238c095dcbe84d5f1","c75ed187c6e0ca8ba4334580c39dcf4c51b21b7a07cc535761d820ca06cb9eaf","c73bb1389b9164d7ce94b41706d7cabd074b10baad4c7ea7a95353fe39fcb5ea","b63af60aa0695369c55c72d2d202d2a5fb8536581ea7aee331ad3c48eba05954","875317d07bdadae00897a73a7f1bc92eef1edc4a674a08e89cd1f30fbe8a615b","db157fed828260fa197f9066f6b89dc0d54f95a65db24f732f440b0995162421","842d900b1cf416b40ed647fb564c02f9f1047f8312564495f259853a966fa9e2"]

Anchored

2026-09-02

Public log entry

search.sigstore.dev, log index 2682592437 · entry 108e9186e8c5677a8bdc…

Expected log hash

0cba4b3248d53abaf7e1c602875f7199dc2f8f0ecf513e6f05c7e522db47bff2 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":"v1788317104782","kind":"published-quote","locale":"en","page":"product:smallpdf/edit-pdf/en","quote":"I have to buy the Pro version","rating":1,"review_date":"2025-09-22","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.smallpdf.app.android","v":1}

Verify in the public log

1. Open the Rekor entry (pre-filled with this proof's log index).
2. In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (579ce28fe270…), which ties this proof's root to the log entry.
3. Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
4. The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
5. 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.