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.

“Turning 2-3hr powerpoint presentations into PDFs results in huge files that are difficult to email, even after compressing pictures.”

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 2657230937

Proof data

Record hash (SHA-256)

0b85d2dcb6d49855c9a25d26a54c82902152071c977b11b2e6bcfc072680b9ef

Signature (Ed25519, base64)

htKGVSuf1uBM9VKCMeo9R9jzRHSyBc8f7BoH41n1wuCnsZ1V+z3aM0AqHaKOEK4p0EnzY+rgVkZXRoTsKAUPCw==

Merkle root

2915d94fc718eb48f67362a65d9a83b80dcd4c926c786eb2e38f4d8ced0439b7

Merkle path

["0b86e3cea4e16b70054b9ed40fa024be0ce107e06a62d4040eb4976d85827391","7682d0a007b02b61e5a7ae57b43e612a99056073b362ee654db270fb1b4a855c","a3001f0d2c0e30aa75fde3f76f0cfb85bd304706f4a4469f95488ade096ac4cf","e0d44532de4db559da50d6d03e7d45a89f750197b04e6ebe82e8a6aeb56b6363","1b0bff626f0f4d13482376d5853ccde95532d19af515d58ea6fd108d205546f6","a6c12ca2eb036015b797535300a95bd00af5fd67aa39574ac5ce7fe087f40b2a","4abf4da2a247c17a8757e9e3b05b3b73642ed7bff6d60452e3e2792e17418356","2a746cd9d79294c44c85c99109744ff5979813fd0c1c8cba958ebfbcf4cd9668","40ad7427cbd806dd032d6b1d2816f3cfdc2a2d637f08b1f4d37f6c7aa48d11d3","1af242205f1616783fdf4711bfa2cadd90cfb6cedf680253f695a0f615e080f6","9762b26d023c4768e29dc834680a7a93f214deb59eb948efd53aac84e79aaae6","a67e5025ed174812cc85ffad7fb608d1ec0e7e7057369282aa8c38f78ecb6fb6","dbdc65b9f91ecf7a21686f427f84950f149ff3313cf7cdbaf938355c0225fc98","5b8a2081ec81ef2101256bd7209457c75dcc1be14257b40200d45a88003c0c32","1936eb7713ae59e20354a37b8314d3745433b23d047da205242414a6fea32b67"]

Anchored

2026-08-31

Public log entry

search.sigstore.dev, log index 2657230937 · entry 108e9186e8c5677a80c3…

Expected log hash

1d9aec1bd239e45b6e622f366eaab4292482e627111ddcfb4c651bb1e08e92ad 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":"v1788143889053","kind":"published-quote","locale":"en","page":"product:smallpdf/compress-pdf/en","quote":"Turning 2-3hr powerpoint presentations into PDFs results in huge files that are difficult to email, even after compressing pictures.","rating":5,"review_date":"2026-07-16","source":"Trustpilot","source_url":"https://www.trustpilot.com/reviews/6a583b9abe845af437dade00","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 (2915d94fc718…), 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.