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.

“Smallpdf claims to be "the all-in-one PDF app trusted by 2.4B+ people for PDF scanning, editing & more."”

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 2621946731

Proof data

Record hash (SHA-256)

0aa0245d835bbae0b9bd6f62e3f9d263943bf148a63f22a255b41a28dc15ebb1

Signature (Ed25519, base64)

uG4KmYi6LQX/rE7WI8KPyZ5/GwDIVVcPcA59b3G38ckQvPefJE0xCrh50JFfggIleowWP9HShONVVQ8piTRKAw==

Merkle root

3dfdf7381c8d7ad52c2e382f4e16b6f321af764e7eaa340297113fa50b9a0792

Merkle path

["0aa0cc2400e6c9229bb37efdece0b0e70ef1319e8bd38fcdd83115ae78fd11b0","d9e15c0d4be9f575ca02a3a0a543e4af537ad8a060e2d816f2dac24c96d0b78b","d1a8e2f90a258cedc503e5701b0d429ea2d21012808e47ce67b44b3a178865f1","29c733951a6e55033ee9cd992f8fb3bd59860e320fc9fd05772e0b63bd1dc55a","49f404ad0046c927965a9ebd38b8b0315677e59a36f1f1d3515b63dcbc67ac5f","5f31e9fb9a081340e79c4ee5c425be5fc73388b5e83c68725e9011d498667bf1","ebd76cd250d616196c1415e9c5642c26b4489fc8a390a09c11e3e3989e72d25b","4b8f26f1c04f55e121b1ea19f164e7fe3d1ab9408103e6c423be3ec09ab088f0","a16531ea09ce7a43f06a4a7953e3ff2a85666ce432ee2ef3090bac6154fb1e7c","52ff7e4d47fd44aa1bbbea0639f6052ee70843863a737e5ed1717bc5f18e6ff5","a969e840d4de72a9205543e10906b676b72b32979189e08f13c86083e720650c","81f5340bb1c2a0054bdc2b1c036e86ac1d05247316c250aa07dd756a5b01354f","83e63a6d799b1ceb15f089aa785a41ce6f782296862900005501fb5bd92d886e","81acff1af3c2bfcaf656a4ff2b93eca8121fe44c1d5b5a4dbce370acad78d2b5","377cd45c8c0bf5fb2c54ade6d9c4a053bed5d007e1a30f5279132a3d565864ef"]

Anchored

2026-08-28

Public log entry

search.sigstore.dev, log index 2621946731 · entry 108e9186e8c5677a0a42…

Expected log hash

ea07e2ac95e2432412286c8e9f169e876b2f38f9762d26c0a0ce3cc128edcf3c 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":"v1787893493942","kind":"published-quote","locale":"de","page":"brand:smallpdf","quote":"Smallpdf claims to be \"the all-in-one PDF app trusted by 2.4B+ people for PDF scanning, editing & more.\"","rating":1,"review_date":"2025-06-24","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 (3dfdf7381c8d…), 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.