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.

“Protonmail is quite crappy as service or platform”

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 2670958253

Proof data

Record hash (SHA-256)

12ab2ff271a242a191edc6715bd688560d2ffc03abf3a9aae3746d481e6d71f3

Signature (Ed25519, base64)

fW7NeqxzZGtwvAU1rKFcIErwq4aIsecGgL2VX1qUzPURKEY5GUUOjE4d9/6k6gHo3jtdTmEJf5kgGMRsvjp+BQ==

Merkle root

500353287506499921f04989c42df7854b05ea5291ea3ed0bcad01dece9553f4

Merkle path

["12aac82af7aa13fa25f673c953eda515828b335132d31738cf1dff61e5b7bafe","e2511b70eedd340fc880e63d5bb1ce38351948abbe0e390777b7907e0991def3","483be5c2ad55ffe3cc5f351478dd6282cd378d5fd718d7d2d0ff36e6acdef957","a33d2a0680474a3f90811a8997db669d97ab4c2d83893af6f83ef0c796de6574","856ad2350fc246768bb31a38c135c78dec2edee85b2c64d202d47f23fb4e7f36","cfc84e755b440ef605e13f7aeb4b3a3904658efe19657778f5611b6ee8dd8a81","1be16e0b7432a8b02639645295dc6e369904f9ee626954645dcde3508d6cada4","19a00d8b56508e7adff2e66bd559af00f74f9fe847936ffe2a1fb12a75f04b85","fb6ad0aa0de8bbc787372b6d7d33d75f558e3773218958146b4ea9deff794f43","8e0a0bdf573b65e0ae61e071aaaa7f0a8fb27591d11005996ada9cbdf09ad356","9e704ffec45067f5b890650fe479cf6dbc2695c6d52a73f5aaa79a29ab228240","507a4740399214a8865148608b59cbc21ed11086bde01d766a9eeb71f20657c2","dc1f75302e8eb5764b35af10620cfb5649598af9700b61a410e6cfa792463a9b","f65c3fc7992a9c662c5731d831f2a2aaf68c1dd6f8c35fabb0fdbac80b751075","f2bbfde0a1628a8e76ff492539bb8f38a83951b89fafe86bcaa38b54c297d493"]

Anchored

2026-09-01

Public log entry

search.sigstore.dev, log index 2670958253 · entry 108e9186e8c5677aefc3…

Expected log hash

40c8dd4ebcafc6bc578b6d879a513ea89a67c5dde4fabf96a5f0fa8cf3f43861 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":"v1788231472951","kind":"published-quote","locale":"en","page":"product:proton/proton-mail/en","quote":"Protonmail is quite crappy as service or platform","rating":1,"review_date":"2026-08-10","source":"Trustpilot","source_url":"https://www.trustpilot.com/reviews/6a79fdb35d21d3393f683027","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 (500353287506…), 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.