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.

“You won't regret using SmallPDF Pro”

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 2524422814

Proof data

Record hash (SHA-256)

0a88a81e85e9b532dfb7408635f2a6bae098713c7e776c916c1c67e542ec8980

Signature (Ed25519, base64)

rLsbCnkFF6Nk6ur9prSwJZvvgMP9D7H+slz0Dsh0CAQMhL0UebNa7LzyHLtIMAW4OTQLhskDL/UH98xEpcpmBA==

Merkle root

f8b4f722de05d6805a889681c3818dbde0f5141f0c8463f2762c4a9a02d66a2e

Merkle path

["0a931dc3ad713a81b7c1e72f338d2e0a0fdc02baaf9e772b3fe19278ce7daa46","87981590c7d1c7dee450383b7274ae413508e1726b708ab77a7abe5859daa724","7ed09e07044e214e14a2056ece8d9b188f86e6680b7931b5cc3f40aad2a44835","5840da4f759c59864063543f3d7e715599f55298549f7ea51bfbcb60e4fdceed","866f02ba258673b04298ab6cc83de06931f94886b82e1644d89fe1d98d5b968d","e87a151e9163ec668beed51dc946d668ddc6a554227b87fb9881e8e2251beef4","1d62ad9a2f9dd28216bb8a072b5aa76f54cf06162416fef2aa667e2cfb4008de","74f3d698d1a6833eaccf512970fb374dcd1001c94e8123e1e84df6257494cd19","6a630fa358fa02f86b52ce64ee65957ebd285d58de02674b83dd86606f79fb4e","7700fc07b19bb2aa16f11a8b94974e9b9ba33fd9fae5d96aa0ed88db134947fd","6d8c836ad510c47531d2203326951d62b53cf7589f51f1e6198684bc9a2a5ff2","f01f1a88016d2021c5a10200fdb43dc229a8703904477e2e0791d78a57d84700","826328db0053b998cfac0c22cd6c575c128ecfa4f75e9fd73febd75c9f8ee792","fd074f6b5b50b116ac3330a06f290a8ebec7ed1849b30507ad6694033af6e1ff","1d6688e1c2658422e04ab99dfb5c8345ecb419dd1f8c6994b4040572f5b4ee4d"]

Anchored

2026-08-20

Public log entry

search.sigstore.dev, log index 2524422814 · entry 108e9186e8c5677a9741…

Expected log hash

e042bf60ab37eb8951abb7a408cc8c7483ec875b9606253deec7a67967130ae2 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":"v1787192294432","kind":"published-quote","locale":"en","page":"product:smallpdf/compress-pdf/en","quote":"You won't regret using SmallPDF Pro","rating":5,"review_date":"2026-08-02","source":"Trustpilot","source_url":"https://www.trustpilot.com/reviews/6a6f42e29c3ebfd1aa58e8d7","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 (f8b4f722de05…), 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.