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 hat mir schon genug Kopfschmerzen bereitet.”

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 2543700701

Proof data

Record hash (SHA-256)

07392b0a2dd4b33722a3b2c3568c1846ab62db22568201292ecac4ba899106c3

Signature (Ed25519, base64)

qgSH0IBUNLw4ST1EqKVDG7Z35Uh/RJS38+G+qQUVNn295NanDqswWpvR2Jkf0L5zrrFVO4nOwcnLpUfAOhv9CQ==

Merkle root

c921242d78a65e026e3281000ec5ef04ef930758058c4fed3f79f3b5ef992cde

Merkle path

["0730eb48d50fb8a772457f94900659b9096584b9b59a9464e08cb1f9806dbc91","29c6fe127dcd3c39246cda544646926486291d1e6ef0dc418280d27db6505d78","5242ce745cd296d5a581e1566799b339d7fd4ad18493fe9ed5f857fc707d5bbe","0976ae8e182824b6bcc6823ff64dd0a33e8d69b33cdf65e882029311670d3660","54102346aaac3cd35193c83b3597e2bc4d43b2dc5280fef142c271677d1a2e24","821aa560c67848c64cf5e00db41baab33c0ae6934ada8fe135c8e2b40dbed35d","f91998a2fc0ca762fa3594f787fde9a23d988602aa05a09ae91528e43895a417","78b87b178409aae547525b6c4f3a10c157da98bb71394b23e557c82eed17639f","0a401e7c31e82c069ee303addccf3c5b1dcce379fd5b8fd31e5f96912f21589c","43469aecfa4e84c5eee947d114bea65e9fddb509e0fd81557da575348c5e1a49","d18b7aafe3c8fa1f41b37100c819f6889d901a72c5a52c083df460825a0362bf","a96676375db3724e1e627228b6d8bd9eedca089634a5496d61b7f5a04aa3f0ba","892281d0b1786415cbbab69d4ec27a4aa9ed68b52615fedb06b3a777f62ec60d","a3747175efd8cc3d769be29f15252da2dfd09eccbeeae76e08b0112f75ae1173","522d5a6bf348351e5632579ca190fcb390464957ba4b4698b399695ee13b67d6"]

Anchored

2026-08-21

Public log entry

search.sigstore.dev, log index 2543700701 · entry 108e9186e8c5677ac7e1…

Expected log hash

c1abaf0323b08bce2cedebaf1993162920ee741ace8973292e7ffdd13aca356b 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":"v1787287374804","kind":"published-quote","locale":"de","page":"product:proton/proton-mail/de","quote":"Protonmail hat mir schon genug Kopfschmerzen bereitet.","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 (c921242d78a6…), 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.