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.

“Their security advisory e-mail not only told me exactly what the problem was I was having,”

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 3178115911

Proof data

Record hash (SHA-256)

28a0884d1d72e5081561bf8ca975f90b364aa679d4de3bd7ee6e790f4d083766

Signature (Ed25519, base64)

qsKiQV6pdvm/qrbfWO1mM+F2fJTyVUEEVDkt4dMfQvMmKXV3rkp/B0lh+U3Bh4FPFlLRbq0AupmAgf5PUf2hDA==

Merkle root

afb9ffbb4b4e88017e1c868247f919ebcfe69f09127d391e7daa08019eb2b63b

Merkle path

["28a41dbb94b0d99b3fee04232976d7dbd0b8e4b0526815bc2d6bdc1cf258e7e3","24f3c25856e38cb23fe12b582d22679d8d7dc05b3e7120a060114a3c4670dec3","af044585a14edbcd2e5ea8c4cac90bac4aab901a0b801b899aefcddc53be7793","03bbf18f56db7bc798f3bc158cf5fadb7e7b01ff581c64cb05197f84cc028c34","6a93d68036965e7c28a5ad740493cba6b0c99f60a617178530453c05eda41009","3c763509dc33558d2253941bbffffab6e175b79cb1f04161b70c7b38b8633c61","92820603451940654cba48caae43a3f267e733175a38e7e5407e49e20f13a0ee","58b2203eff5e4f19285f0aeefeccc534122aee1d12f8733b6429b4c6c11ea8b6","e29984c2313296d47ab851d053048e42f28f2a743750a841cec0a1c9c10010cb","09dff2a9b9a8a7e6ab912b24265f45b99c479617e4936e07f3a2745a9db9f258","f83944b16fbf43a8904cde916c26d245f82f3fecd41aad7e2fe680a6de8825bf","e7d5f6e88126b47f3ee25c7741cdcaebb40c6bcd9d35a859108e3ac93e8a0b29","09648cb4275ce9eb9f26709778da1b3653a6ea84465537d5f6fe5c1b17d3cea0","15ecb20ce6559654c94b8b858c027c014996a92eb19771813db0b794d6214fb6","72bbc4ee0a973113b1d556f76d02fea2c4704794a0d313a96e49ff7b6174dec2"]

Anchored

2026-10-10

Public log entry

search.sigstore.dev, log index 3178115911 · entry 108e9186e8c5677a2bba…

Expected log hash

a144ffc32dfaa9fe45b4895b7f4c17280667152868dd8de227ca2811c60c870f 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":"v1791604579182","kind":"published-quote","locale":"en","page":"brand:fastmail","quote":"Their security advisory e-mail not only told me exactly what the problem was I was having,","rating":5,"review_date":"2025-11-08","source":"Trustpilot","source_url":"https://www.trustpilot.com/reviews/690f4fb435a243acfec56a29","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 (afb9ffbb4b4e…), 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.