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 have used Smallpdf for many years.”

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 2543266411

Proof data

Record hash (SHA-256)

0ada67c9ddf3230bba87fd664a194c8c3f14a86d26a7367aa9d54d9eba96bbcb

Signature (Ed25519, base64)

3xILz9Wnw0IOClQYUG4elFqc3Q29UphDRGWmOZVyhKNEITyDw4C7yIhs2BRmvZa4qw0XxBeAD9wxLwt8lRczAw==

Merkle root

8ffad6e97d1457610bec7a891f189d1ba7dd7a92ca672c69ff1ce3283acb4b5c

Merkle path

["0adcc0f695425143328e2f79bcc41281a6b0e67605d115c15b3be5f669f8e1e0","4f56004308e90b753cb95b1d2a441520d57c8264b95964ef2e50c061e8dbf029","2f0bbc3dd24493518771e4acce4a43c40d610c5fbea7f5cc788d1e913dd0f0b5","06d0ee2b88d621aca771e6c61d6164d7f7e748c2cef452d7da4c7a424e69df45","03e10fe3371c457c4d47e1cdcb607ffb33ab56ca3972fda44be9c6f7fd5d0a58","1a40929186f8d3e93a7ab09c923171c0cf98c31f4796e9fe47b359239af37231","bb67e26ecfc811aaaa7a6b86a02a27905e03a91d91bdc721d548c7ef001f2d77","dd7f90a8f451a39d8b8b8788fc7223ca2e7ca07da9e29f322e6085cc809c7c45","65b2c6c6700aa6d595feeed4b1f76d903b4ebb359ee8969b12192c48d984b5a0","aa885a706ca651a0e4483ad9a829440642a72ab98f1b72bd7e15fe8491229f66","cdab6187ee84b886981f9303deeafe282772de8d8b15616e2caab3e624f1da14","d64f3721b92c9ae5b9df50985c17025ba26aaaf1939e950e5e063d45934e49dc","a96778a5baf37ff274f68eb2f3763035e6ca2771bce9e48327b04149f6a9cf89","c3da944168348f2737a3a033a43606f7965e05f20058b59547dacbfe770ef5ce","e9f7ba9964da1314f660fb2f84a68d574ffe9983879b5b54001a09ca5cb5f33e"]

Anchored

2026-08-21

Public log entry

search.sigstore.dev, log index 2543266411 · entry 108e9186e8c5677a241f…

Expected log hash

443ef8f29d5167ebb4c56a46778facd07b7651afa8db2d089c14a991ce0d04db 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":"v1787284817344","kind":"published-quote","locale":"en","page":"product:smallpdf/smallpdf-mobile-app/en","quote":"I have used Smallpdf for many years.","rating":5,"review_date":"2026-06-25","source":"Trustpilot","source_url":"https://www.trustpilot.com/reviews/6a3d675adb4393914279e032","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 (8ffad6e97d14…), 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.