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 used it for studying, for my university exams!”

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 3124493015

Proof data

Record hash (SHA-256)

02f88f74b0c8980ce65d628e2ec96fe3b4e269aa40b13b083cae94815042ad92

Signature (Ed25519, base64)

9r7KAGPc5d9K5QXRwy3KaytBPZuuUbNNa9Wy6Umuo2cqrz2qndj0Pyo1l8fF5aQAtWZdFaVazOSsNOTSM+EPAA==

Merkle root

c481d62412848235567fda063ff4784e8e49df41ad8b5c570de24ba396415d22

Merkle path

["02f67615b9276dc5e2b54469c156d9878b54dd93b0d942826ed89816e9131f46","8140d5beb1351ba81382004b0bc01ac3d6927c2df0a908b9aa8ef650efcce19b","2170a1360224e785d9932485c0f190764fcacc96ce8b6faf96dca13459b5f718","bb7f3e9ac199353072032d0a6091e282004591bcf3f99eed15e5289890e660f0","5031f24f44f34f4c9a53244d08ef183f9be80534b5f83f326c8b552cd4fff298","a353d6072336179591c2644c6abb1033912716e64ef24463be75f2c29b55d21c","03aefe4da8862acf22ce787bb484309f73718bf11c3c7c3ebad5ca0f261242e5","1aef2f6b2ddf22fd9d80e88160904505d695da7018f85e9d794a32b9d0d3ee18","831c7833c15faf2af60d184f63902e165497b4bb27206b9975423e820b7e592f","c40f017a221b69b05bf95e5ce3919ec2676b831c6309fb8ad3d172a7faea5d28","05ef8f764d5e2e1d337d2625ac3c0827f82e8574a89c33de74187101fc420dc3","1e420c13b7798af08501fbe6365ddc5b44e5ea7ed3d656d15db245d747c77a23","818f0135095488afaa32256706f222f09138af7de4410ea79d618f621eaf5cb2","ed99a4b837bfc052822e7d0dbdd9c56431a87e8600550f5deaf9f7068616c82e","0cbfc145d581a4c4b7198ff8f397c34cb4ba6263e9e9892372f878302426dbe6"]

Anchored

2026-10-07

Public log entry

search.sigstore.dev, log index 3124493015 · entry 108e9186e8c5677aee70…

Expected log hash

0056b042c00529af1248b70a0a2fbed761990dd7841ea722369c29a2685ea6e1 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":"v1791350987184","kind":"published-quote","locale":"en","page":"brand:smallpdf","quote":"I used it for studying, for my university exams!","rating":5,"review_date":"2026-04-29","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 (c481d6241284…), 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.