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.

“Easy to operate, reliable, and consistently delivers accurate measurements.”

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 2621523249

Proof data

Record hash (SHA-256)

ff20874b45d4119fcca37ff619e2d4ed96d6a470bd0c8463bb377a21d5b04c8a

Signature (Ed25519, base64)

gvXBgkXvQWDUMs1ll7ZZ5JJ8byy9wnhyXWgyGqGq+OX78SKIMrcqXhfLHwOSPLBpds/Xu+v2R5/C1rm2yCjoBA==

Merkle root

6471d9991f0d0aacdf442d5cfa660f2886071005e4c3d26a992a3bf38f0a7695

Merkle path

["ff1c66ad65ede0a9ebdf5b7855c31e7447523deda55390a66adae6b5185b3e53","be50912ca118a781f8cbf1d4b7a77fb3fc8aa8b33dbc8af887cba5ee7effe4ad","d230d2660b896db051ff9d6e2eb4a1ff6f37884e39c517e8b13719c27273ef05","708e819832475cf4abc869a52866ef7982f119e6be5c190505e85ec78a1af91e","cb4fb3d235716556c4bc14e8a63316f04abda0266f2b00b05442171ba717ca07","8d69a9f02ad99b72bdb955c47f28a739d4b67f1cc9093c535e6cc633a36e47ee","62207154ddcc07e19f9a8ede0cb9a31ee7a08ad834e2496a64af5060b9241aee","db44ebd36276d39efc1fb6020f4d8a746a6d1c86c187797604e90f0aff9a5ec9","56a77a7bd52cc2e64564841aff64286d4b078f691411dfa575e2c40b56f4336e","cc5942773edeb6f1cb740951ef769ef0e7d229b32c06f61e882e119d00c000ce"]

Anchored

2026-08-28

Public log entry

search.sigstore.dev, log index 2621523249 · entry 108e9186e8c5677ad576…

Expected log hash

644ce1c7a13e9edd388468f8e29bb74f49a15185930851951709e16eaf23744b 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":"v1787888369667","kind":"published-quote","locale":"en","page":"theme:metrohm/quality/en","quote":"Easy to operate, reliable, and consistently delivers accurate measurements.","rating":5,"review_date":"2026-03-25","source":"SelectScience","source_url":"https://www.selectscience.net/product/901-titrando-for-karl-fischer-titration#reviews","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 (6471d9991f0d…), 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.