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.

“the app title says you can edit PDFs”

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 2682517241

Proof data

Record hash (SHA-256)

16679acac946c2af068a7ff26cdcc63859cf0d10994b2b2a14f039bfdb42f05b

Signature (Ed25519, base64)

khSAM3wcT14GGKrLAWZgYppTu4aBs5Oh1Wyy3rM6wF5n/V4VE+e6beKmIgXETqeBwYjQ7mI7tPo7zay5EN3VDA==

Merkle root

c280d9ed12ff4c0b3255dc7898b16f1930cd4119f42946bcb4cd68d076a2b332

Merkle path

["166ae510601ffde58b6ba513acb4fdd7841c7ca7e31796514a28cea618afe59f","fb85d5150c078869d9f01504661f6b02c0c9ac59893754ad0958cf7ec3c78fc6","f8219f027b51c94b404b121d99ee83771c8e350e1ea32ff88a26fc208df94e94","b9cee6a176300fd76009ab8eee00acf65f5afaea10a20743e416c462e3852e07","48c73e5d2d068800aeebdbf4660aacba7c8db195bfa89f76ebe7c78a488a54c5","8372db7ee2afd609e798311233b39d687d07cfe04997bf23f164532fccdb4569","a784317e08e4e75d2db35c5ebfc3f210032cc7dddb555c1d6f9a4d6d80875763","7d14f4c47f59cdab509ac64d8c026dc1fb0b7d28d849974e7316907c48029c4a","76ad36586dfef2ac7f32e8dcbd918eefacacf75230c49507cb5ed0471e9535c4","5d2942579b2377b2455c8d27b20856548c126ace42556b0ad33f538d9da78733","851cc3041ec5b05d9c841e29cd1ca6d4fad0de3b36f0d3b7ac0bbf97a993e29f","c7280c15127cb14ec06a036a563a7851a4692e8c96907e84f3b9d6723a93709f","420b89a5765bf5e1ee3ca525653a85d95f68d0a5f95e1e3aa883275c5f706eff","1bb9d77697b03c52c52f610920bf29cd71b9d55ec5c24ed66e499e51e9290526","318e458e36dfc92952cbf790d510c87679554507275d835c305b6eafec626494"]

Anchored

2026-09-02

Public log entry

search.sigstore.dev, log index 2682517241 · entry 108e9186e8c5677ae940…

Expected log hash

4dd627b405b5e14bbbc331be73be3f78a12bcfd7daf600ed87868080d5d2f664 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":"v1788316240490","kind":"published-quote","locale":"de","page":"product:acrobat/pdf-editor/de","quote":"the app title says you can edit PDFs","rating":1,"review_date":"2026-07-22","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.adobe.reader","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 (c280d9ed12ff…), 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.