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.

“Die kostenpflichtigen Dienste sind maßlos überteuert.”

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 3665856061

Proof data

Record hash (SHA-256)

092b63375846e761d6a97efe9dfd09fcf2ba678bed08b5e0bae35e7cb2d653f3

Signature (Ed25519, base64)

8cG0imG/pXyfkvM+rfTwI4rIDyqpX6hJ3pAEfG8D3vq9H7nIIf9rJtWN173Oc/hf/E2BwKw5YA6AjhMpxoeyDw==

Merkle root

30e6dec0d0882018a3e7bccf18a3222b7daad8045915eee7523618b7cf75b77e

Merkle path

["093659d21b2f3f40bf96026529a5591d1c70b0bd007838a9e83ad9832a218cb7","5c075c3994041b9d47b4b3cf88b4795905f48aa7683b118a012ab14aa8f1430d","7c78fea90158819e37e3411f28cc16793e6c8ac0d60d4a213ae818987a9b8b2e","1ac076370b2c76c92fb04002e07489c070783e0a8809b0e87fd727d9af9a0f8b","73c2c505267a01438cc145808da588b850ca2e00a5a5d750e7f7f23dfb40b9cf","2c9099233cab3112e327e62b4db50b9c075823e955a377bf741a3bdc9e0c5d2c","128282b6f10310ade6c2c887446b8ee4f3f6839e4c35faf61d733f7038d6256d","fa12f1cec5a5df4f0cfcefb5e5fb8c7da9cc12149273629a43509ad6239c478f","a2493b5bf3e0c12206ebd3d497f2f48643d1aa8abb29dd504a496f0ff5d87842","5118ccf7e815cde83a7a81251633fabe8fd16f8c5ab105e15b1895a648804182","7fd72173f45524d175f6c633973e8c30e8df12f70bff21bf410e7b33944e0ead","912fcc514d19cd9cbe0a1b4ab754d197504acd67486645ee4aa172fb248dca00","46692bc80fe953f4d8d52179b535334176c04357301aae92a75d811dbddb72b7"]

Anchored

2026-11-03

Public log entry

search.sigstore.dev, log index 3665856061 · entry 108e9186e8c5677a72e2…

Expected log hash

ffc1bb1abaed68d6145f4de3e9055a9ceb42d7f5a099d941c361cb153635fb0e 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":"v1793699634728","kind":"published-quote","locale":"en","page":"brand:proton","quote":"Die kostenpflichtigen Dienste sind maßlos überteuert.","rating":2,"review_date":"2026-07-08","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=ch.protonmail.android","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 (30e6dec0d088…), 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.