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.

“Discontinuance of dedicated Signature PDF format has made this task much more difficult”
Apple App Store · 3/5 · 2025-09-18

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 2514496096

Proof data

Record hash (SHA-256): 6c62626477fce4965237d309210d57411549abc9593e37c8cf3f5e96645e3eb4
Signature (Ed25519, base64): 0vwKkoMHTZ6vnULHWns4dKBqn4wEIngMb5p643twqk/Q31lb5VYJiFBaWPvNB18WTUwXVwncoK3IcuFLxrd5DA==
Merkle root: 790984da83ec061260aa072fed7636f9dedf91964fe0be93d7a7a622b2b5a92c
Merkle path: ["6c61e811e93166f8f6114e8d90189d1c78665e2e3fe8a4ee56d32f4f488f6b0e","65b151528dfec2fd54efbe4c04ab913a812072a539f263e2706031bed36bbc8b","a1c24c1f3dca9160d345cd43d99ca2155992f91520b04d2faafedc58f4f627fb","12fb54b80271dffde495688c929d10d64bc3f750c8abb76789d27ccc38b6f61d","7ece5960ac8de5cf553c656bc1dd0d21ffefbe7710837c74e3ebb365849962b0","ff78016a6fa86746c90a360a738400c0038bcc01746f3d1adf5b4bfd39c4c4ba","c616bd0e8ee39c63bd44d09fc07e6f33b870837c2782b40b9073f1cc7542a6c6","cd8d7367fdc43b39f9a2ee86b29d23cec2a229f447cc07e3d1cbd9f9f286ec90","0ae117613ea9573bef44151f365b90abea4a35b0561d82a530928dc7f0c50f9c","a71d4d37c4100572ab4d2d2c91c8303d7966b7ce707956f61e07695f69478f79","a0fbbcf462ffc4886579e3dd0ceced43a9ce73cdecfadf6a763b154492128976","90f0a0e3211fc23b1e8db52b76383f6519eac469757414a3b9d5875619fb9c0d","6119aef4031d03205576aa94cf7a51dbc6eedfdd420d909f325579401c8abd0c","19cc354f6573191d4e7914f94cb811eea176897530d869ad83bfe3cb7fd5f206","c7feebd3045cc2c03d87ca1241b2d06259ffad35db645c59ca3c5ee2004a8947"]
Anchored: 2026-08-19
Public log entry: search.sigstore.dev, log index 2514496096 · entry 108e9186e8c5677aad27…
Expected log hash: 5d2238ef768473286d75355f523ab94503f4ccd3d25e17e9efb265aa0f540183 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":"v1787129810322","kind":"published-quote","locale":"en","page":"product:acrobat/sign-pdf/en","quote":"Discontinuance of dedicated Signature PDF format has made this task much more difficult","rating":3,"review_date":"2025-09-18","source":"Apple App Store","source_url":"https://apps.apple.com/nz/app/id469337564?see-all=reviews","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 (790984da83ec…), 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.