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.

“Es kann ohne Abonnement keine PDFs mehr als eine bearbeiten.”

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 2543700701

Proof data

Record hash (SHA-256)

08c3ebef2e00375234e7a7592c86e8e52b608adb6e3e0dced8a347e896177cd9

Signature (Ed25519, base64)

4CgWRGNjO9/goefd89mxt8FPjf/MBND/XKbAmDLF+SgZY8x73CcofNaUffGT+tMh3KgmeY1Hp1wV/+TTjTPdCg==

Merkle root

c921242d78a65e026e3281000ec5ef04ef930758058c4fed3f79f3b5ef992cde

Merkle path

["08c2cb394c738fc695ae32a7c576596dfda85bfa42d3f0820fea55191bd9fd57","1f84b2898a218bc5305ad7f71b7177d6ce0c52c88996cc89deca15a589d76e21","1326aedc4fe2215565f66542ed367a3ebee45bf37ec7f08832acc0a28db9f6ee","dc6e87377da177b1b748cef2502d48cac7c8684baef29de30920a53a7716a7be","baf3d79185980694671f2ea0de8ffe2a2b4aaf85e0f9877fe7a76085e2a786ed","401ec4d866d5aa0eb7732562aa0f4683240c749ca0413858a8772f264dd3bedd","196c4b0c3882eb177b850297647e769771558c8b5e1d2116ae7fbcfa884028d5","ba8835ffa77dd369821cf5714d0305ee5e990a90195c2b2227673e919c102728","0a401e7c31e82c069ee303addccf3c5b1dcce379fd5b8fd31e5f96912f21589c","43469aecfa4e84c5eee947d114bea65e9fddb509e0fd81557da575348c5e1a49","d18b7aafe3c8fa1f41b37100c819f6889d901a72c5a52c083df460825a0362bf","a96676375db3724e1e627228b6d8bd9eedca089634a5496d61b7f5a04aa3f0ba","892281d0b1786415cbbab69d4ec27a4aa9ed68b52615fedb06b3a777f62ec60d","a3747175efd8cc3d769be29f15252da2dfd09eccbeeae76e08b0112f75ae1173","522d5a6bf348351e5632579ca190fcb390464957ba4b4698b399695ee13b67d6"]

Anchored

2026-08-21

Public log entry

search.sigstore.dev, log index 2543700701 · entry 108e9186e8c5677ac7e1…

Expected log hash

c1abaf0323b08bce2cedebaf1993162920ee741ace8973292e7ffdd13aca356b 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":"v1787287374804","kind":"published-quote","locale":"de","page":"product:smallpdf/edit-pdf/de","quote":"Es kann ohne Abonnement keine PDFs mehr als eine bearbeiten.","rating":1,"review_date":"2026-05-06","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 (c921242d78a6…), 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.