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.

“Ich habe VPN Plus abonniert, aber das Abo nicht erhalten.”

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 2543978942

Proof data

Record hash (SHA-256)

0c63f5c37164f6f22b31ba248c831fdb0dfd53844524f1751e6f19c58de6ff7c

Signature (Ed25519, base64)

SKG3Op5oMenp0ogw2y6i9wY/h2tunG9qRxHys639Tjhd37Bx01anjA0R5UVZa8qXqej5Kyn2JvnMdBqTfbsBBA==

Merkle root

3ea09355a1b22a15fffcd33ac0d37e4039cee2896092e637dd8c4e7dfb5d507a

Merkle path

["0c622e02f9dba00c8aeb66411a18e7df06f7f4b0501e3fdd3315eed175bd7afc","070d54a6333644549dd0905a9e3e8c2751a449e7726363ff78e8d45eefddb754","ab765c86609e6177e243a54165b653c69da0abdbdbec91d99196dbdd9b73bb98","328195ad92e2fb9758c0dcb6eedab50137cc3721bfdd0a89092110b799db20f8","2c5ca1a18ee8bfad9074248debcaa72b146f9200034307c4202712490f614b1a","44ba5624ecdbeb954f585c452e3e40a36059426027b117fff89ff7c247813e8b","5c9762da270ef79481feaa318486eb34a9fcabb773d94de1691b9e9026dc95c9","6132ea21634f106becc07149241688982d105438f33f18735f0eec20abed4d7b","f82075cd622982334bb95774ae5b48c302302ad8de987a8db46783c63bbb66dd","1dafa8a2a3864ac60c02ef780518ccecfb4fd101652b61be84317386091e9189","4aece6e36b20c735f7d8b81f0d91a42d33cde64af9c80b0344c2e1802a6c7556","1d5c12a26bd5f3e912e34a6f20b7e6e188b9e1c8844527140789c47763eda015","cdf1574b5ad3d2b698b1a16a8e9aea647ec4ea1fe5581e45359580053346d889","c813a34665dab5ffae8513e10cc2fedc27edee77c70c636abfc3ac5275137875","331ffac0f34e1f76cacd782a04285f7bacef5f5dffbd1f8163703fce9b22280d"]

Anchored

2026-08-21

Public log entry

search.sigstore.dev, log index 2543978942 · entry 108e9186e8c5677ac836…

Expected log hash

69ff2d97383073bd392d75b79533a80cb25c69be55aee7dcb24b1acf4a379172 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":"v1787289230204","kind":"published-quote","locale":"de","page":"subtheme:proton/ordering/gratis-plan-upgrades/de","quote":"Ich habe VPN Plus abonniert, aber das Abo nicht erhalten.","rating":1,"review_date":"2026-07-29","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=ch.protonvpn.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 (3ea09355a1b2…), 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.