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.

“this is a great product”

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 3258673097

Proof data

Record hash (SHA-256)

22f77b95833c404c31a5b9fc3b878baa4f92f00f5178d0fb4be5352cd9ebe924

Signature (Ed25519, base64)

UV/cAINW25GRWrEP4C08UVivcIjigmKoKUEHugQck+hU6kfbdZ5rtj2d239wE2hEeEerIoqyYyg5ZP2/cy+UBw==

Merkle root

1e69109d842117168677c2c7aab9689ac78923960f86fb642566271a6ebec358

Merkle path

["22ff735d6d9afcb92f87ae5d743e4a1ea4e0ca5b3aef74a86b84bd19340ce039","43ef52a686552ceb3cd2bc0bda0ffdfb4ab78ad6346641eeaebf789a92c98d8d","716861643db0ab272ed94435f210f0051f5ef1865dad2955a313b23087432246","3965c8aa8b86f8f795a35d84917bec86974038483cfb01c79dc3199ed438cd91","6a0d96ec3c5b18103de8cfd86b0a39e3c7a36a749362b58473019963520dde67","d772cca73d9a350c3805e6e0adbd62877ddc7604d14ae26e2534152bd1fcb752","2bcf667f55f4463a70871cd175e104116fcb800a5b5feeaa572eaee5f91d18f8","1e16ea3f0544499ad54298515aca792cfd6fd4e113e1cf1af0df8656e670d82b","e335a4fe9ad113dcfbd9c9c90214d0f47c30c761e71929a17f4dc9822665a1a4","bb094f12ad8bee60309abca679b6f983a5aa44cc3c57042af88426c6fccf13d5","aa8f2c33d97c0ac8dc7d77c1105a2ffd53ba88f60ca9a946d664919a827dd74c","e8ee33453c42c8b9a0e73dbe9a65f0ef421d213e42b0e7964904098c25de97d6","7c33667a483d5fd3b9ed47c00df3203f479cead457d361a57e3e5a90d1401d8b","4db0e65440b78c494263fe6b915a75fbf2b04ea1cd2fed0eeba5f9cb4589aa37"]

Anchored

2026-10-15

Public log entry

search.sigstore.dev, log index 3258673097 · entry 108e9186e8c5677ab832…

Expected log hash

c57cff5f0f2da5f1c24e09823c0cd10c485830bed55f44ffe5864187f8e896d3 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":"v1792033864449","kind":"published-quote","locale":"en","page":"brand:expressvpn","quote":"this is a great product","rating":5,"review_date":"2026-08-31","source":"Trustpilot","source_url":"https://www.trustpilot.com/reviews/6a9567ccf592b58dd4b48624","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 (1e69109d8421…), 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.