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.

“Sehr nützlich in allen Bereichen der PDF-Bearbeitung”

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 2683150346

Proof data

Record hash (SHA-256)

13d8267753a54f9c73a1817ded79af89f7a9f6aeb81590ef008a8952dde78f20

Signature (Ed25519, base64)

QrjuzEZt/+CxazP5kAdevHPOle1miS1lk0f/567Ntfi9MCyw7gFajek1j4YTDh0cib7ev9e/3IdB8kThjUUgAg==

Merkle root

ed1b76d4f3111cb6e235a9fe679fe4fe63795d3193935a8c023245679c12c88c

Merkle path

["13d71013bc259bd68ebd301ddaa4808ff9f0247f7464eb4b02e9a0555d04788f","67d8ec31acdaa245db3d7fc61a7e89fe85a785ff789783d510198b2d39170a17","ca99041c10dcac3a588e1e743a2d9f98728c7f43d9dbf1fc17f9fe0eda799ec5","44d968e370c110698c89c46b35c532209e3b9d4e4fae35e094acd9dc61116820","e86177030620047af441a515af83384b36c87d0604052b1ac52858f7d9dda5ee","11a8b60a56bc461aba41f347f9f5cbf685202f4d6136f1eb6327d17e7d64dfea","53ecee35af005fa47dda193010660c9b84973cec1e34ebf9aff96d3f7b6784ae","9396ef6bbc767fa07f704f8044e874eebbe5b9a7101b5d1e50dcb4e0859d3583","4b66396bbb9517b8e92ee18211927d06452634aca17e753029015797ef4c7d2b","cb90f700d062dbd3125e6d95fd56f5f849b0e0c14ff96509c47d1365d97a2e1d","19fcfb0164ff07216f6cdafc3cae8d76bf53cfd941710f95f1058e0faa3280b4","07f7d14c8e1cf61f4c1da21e46a47631e1db47dd71d22b170f100a5bf052a4dc","d95f737cdc8d09dffb520130b23d2e91ee7119eb9a2a85d7ec6c56a05cc092d9","222137c91498adc204f412ffa9667367d79d38be98153f9b235308fff5e7e9de","6ff3db889906bd05786277e2021c1872c21f64759ecafab0fa871f6865f90ece"]

Anchored

2026-09-02

Public log entry

search.sigstore.dev, log index 2683150346 · entry 108e9186e8c5677a5378…

Expected log hash

ce2f0f51099dd771a165694fb25d868068d124ce108279fd9df180f0ea90a863 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":"v1788320836912","kind":"published-quote","locale":"de","page":"product:smallpdf/ai-question-generator/de","quote":"Sehr nützlich in allen Bereichen der PDF-Bearbeitung","rating":5,"review_date":"2026-07-20","source":"Capterra","source_url":"https://www.capterra.com/p/172606/Smallpdf/reviews/","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 (ed1b76d4f311…), 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.