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.

“Großartiges Instrument mit geringem Wartungsaufwand.”

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 2621780523

Proof data

Record hash (SHA-256)

f1cbd380cbda6adfa6e4cc205244f95ba398faa676fc7b7b61c904027407bb3c

Signature (Ed25519, base64)

iK2MDJhxVn4bkGw/2DeTe9NHoR4Ze5iqLdoVUqcdGmlMpAjB7t69sOEzlPc3ZwUid02mI594MFY+DeOIAFOKBw==

Merkle root

7b426d9a8e4778c60509753003c7b551184ce3f76e1db9b678c604656c147d81

Merkle path

["f1cf102b4975ef8b1926f9d3469de5372f3a56281ec73c389e004402643078dc","8cd47da1f7a66e95edc8e58829695cc5608ca11c570809cc6fc8c942ac729398","448e5f7ffca7e970da85a6c9f897a7302280435ee878f0d6e86ad1fe581de1dd","129fdb6a82b833754d311e61be30348a1841bda2c347fc74905a340d7f78e7d4","ff7f7308344c9a255a1bf7d61bd647782ab9ad51b36a293e00d14bba60464be5","ef381cc59c279acced0fb4cd9f267982db4a17c30b5bb18f8a0533a212f8cf2c","1d4a469b5d94d12b413ae5f9cc13dfedf10917d23f7d3f06cafdcc25ac09a2b4","756a1e7305265360d80fb1f96fcc2450c9eebc4e549d861c40ed9229f4839fec","8d1ac52974b6154176bb06c0a39e29ca2d1dd577fa6982680dbf40b333dc862d","94654069e42bc85c079f3356e12080234e3828f953867c05a12c9df1c8fc22e0","759e304c8074b6d86fd8a9b078530d00b56ead93080808a9b90c1d6c5dd6841d","8f057c4aab4c8197e2b19c70f1027e1e83ee816ff92ae5e30b2fb4adb3a9d7fb","8de93e7111b0620c206de1ed4c3cdb8e0242cf0ce102b04cba74b27a6adc3dd4","5cfd3f01cfc088b9ce004c6cc4dda4490d6ee2e150a101125197cdd0e0e5936f"]

Anchored

2026-08-28

Public log entry

search.sigstore.dev, log index 2621780523 · entry 108e9186e8c5677a0666…

Expected log hash

8cedab57a40119bdaca7f2b5c6cf9bb1e2c3e69dc6a6b7339d16a6592c70750e 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":"v1787891923870","kind":"published-quote","locale":"de","page":"theme:metrohm/durability/de","quote":"Großartiges Instrument mit geringem Wartungsaufwand.","rating":3,"review_date":"2024-10-17","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 (7b426d9a8e47…), 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.