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.

“Der Karl-Fischer-Autotitrator funktioniert genau wie erwartet.”

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 2621591821

Proof data

Record hash (SHA-256)

ff0f1a1982e44942d6be692d0038e560831e5a793b5c77a6ae59b1483c4fad03

Signature (Ed25519, base64)

bFFek8qaygUqGh18QwE5BlgghbIjFPt2sFB3eCbWlFEeJmvmvMEJ8QzbSrMX6tGL1lPX41bVdtGWHlVkRYWHAQ==

Merkle root

80ef8d8174e5c9e41c4b3e86fd7f016ae3808fd6df1be7f458d6b538ad4a1573

Merkle path

["ff0d7b91b2aaeb950db6d8404414e176a3625213606a320e0d0b0bac0aacc247","12197d9a36790387460f68a67b9349c661f82c203754181f56a4b540cac641e3","8793cd486bc5e240dc9c2e8d23a93f39affc77cd6bb6231cbaa068d18a694da3","0162977ac65f6b1d5f4bb273b44d6fd8108e8eb016d7fc7e5e6d68d13bba6a93","c09a7b1712d648a8bfb89086a9cdac1d4578175c10922fd1b2494fc2caf3baa1","29f2b65902d84940668b5b4f653130f21eedded66b9f4d035727e5ddd7baea32","ad2a05be7b48244fa7af465fc1d70e7e370f0dd14be174f6559bc220e42e35c3","85b3cfa48841fb40091109ae61ff52a47f69b7f98615ce8b5627d6075bb2e5cd","b2e057f6d3dc99e972525873df46d4f5c7cce951e4ed689e0187dbd2ed661f51","39e0a5a8aea0469ddc4b7eb4f23756e8c15e3b75fe42ee4002904a9576881ad0"]

Anchored

2026-08-28

Public log entry

search.sigstore.dev, log index 2621591821 · entry 108e9186e8c5677aaebc…

Expected log hash

1103461f2f136c93d3dd608a948686a2f30160cf05200779542dada269979b94 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":"v1787890464756","kind":"published-quote","locale":"de","page":"theme:metrohm/quality/de","quote":"Der Karl-Fischer-Autotitrator funktioniert genau wie erwartet.","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 (80ef8d8174e5…), 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.