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've deleted Acrobat and other apps from every device I have and installed Smallpdf”

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 2524617489

Proof data

Record hash (SHA-256)

0d89db1d8e0228097308e030368fd7f232faa756b19496cf04f602d79662601b

Signature (Ed25519, base64)

W+GJM3QKiNzN3qWFOb026OOFZg0ojDoz8nARGq3jDsPghjY2UQDO7mbcQC15Ri60CUbs5rTQeE9A6z9H5oDcDQ==

Merkle root

5c4849a28e8624d6f6d3204e1f81a6b24f2188b6690e8b122801054617ca25d8

Merkle path

["0d89bb2395dd26c5f5a8f7144ed54f7acc145bbaee3fac122cf2e4b7f52dc89f","49aad93f5cae5bdc8bd26c3e94454db2fb5b434b99c8bbec1a1a326c6201c5fa","7fd611ee0699b2333853b143d6e47c1cd18bf190dec6b31a2ccca38714e0538a","75bf1acf35406e15f09e20743bb3af243f1e38d65c7fc465b04c6e8cc0e76767","fea80f4474391988f629f82ab373a60863ab01f83c7ee36a4b09dc77ab4e1f54","f301602c2756e286929e238b52604cf552e0c51817cfec4bbb843b5239f07e22","2425a6c935c03ee16ef38ef9097ec635cd0aeefaac7290dc585ba998a2dba15b","42bb8b1a0da68ed2158baadb27a92312242dbd793e76207e52358dcf1e9db50f","18b170badcf2d193e6a21591756eeaff6e7d13bb4009f8fffcfbdbe8af2b9d77","5e761cd91d7763ec2688e3783040041152536c1d3ccb4debbf192825c5ff8029","78f919805cc459f038ec12cee7b5c6ce3ba8cb52e32db58314807f6532c2a82d","d4188d2c80932f475c810ced976fef9d816f34d9a371db67d8b88d0e2c021c71","294fbe7fed0fa3af8e60ca01a3a05891e9e1266a19028060f205705712eb6e96","9693116cb745ecfbff942949993950a2efc72f3f48b394aa6516ac43c745a9a2","649f189ed3a422a3ffceae7f7673f3e683a1fac940fd27a4d89bce585dd48e49"]

Anchored

2026-08-20

Public log entry

search.sigstore.dev, log index 2524617489 · entry 108e9186e8c5677ab139…

Expected log hash

2051fcd76f2ba790414bb1c15fd4d3d064889742ea46f8e55b5028f1f571c27b 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":"v1787193158162","kind":"published-quote","locale":"en","page":"product:smallpdf/edit-pdf/en","quote":"I've deleted Acrobat and other apps from every device I have and installed Smallpdf","rating":5,"review_date":"2026-07-08","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 (5c4849a28e86…), 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.