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 App hat mir automatisch den Betrag für ein Jahresabo abgebucht”

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 2907673729

Proof data

Record hash (SHA-256)

4367b68448c3ad9d589b64477906b35b4ad91fd2aa388088f8342ce8260c09de

Signature (Ed25519, base64)

D/2sNTm0XKLKhzTeAi+NuPjmInIluGWl50hwz0HAeHdea99XvPp8mGplLljs7Ubbu6avY60cMKKzRHvSazSQAw==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["436308529dd3a9c5200ef0dc6df612e3efd437fe1f7b80cb778100376eadf1c7","d4d6afdf19ee8c804f7ac153b08f9d758a733de87a5337329e91b167283f2663","2a90f4194588bc2a77ca9a2ca8a1e16420524c03e6b9c85d396802f69def967c","b2d5ccec1e41da570b58c1d393cdf69c454d31608891bdaeeb1924764e33b289","df67dcc7d5bfc364abf9befc0800e89dc2fdae0a849ae23374fab5b0040d2291","2926504943f424322fd5c664a7f39d9e513cd64e1ec558061c178557e3f5cf82","b5a0e35937000ef552cd29ec8eed00db8570514a3f5d264afccced95ed8d98f2","0d2d38f034446931e101d4ea201573f7f8ff4076f494e5e37423fbe60b7d185b","d2140808f58f5eccc720e1f71af27498e602b7e6d523dff938a14b8b77d3773a","5287395aef2f8a25e88c8a3c50924147993f490f4003ef422cd6d48fa486ac95","e872ff0eb276cc0ea0ac8b3848489a979ea5a1ac479562bc60b28df50a3b89cb","94e922a61249c96280c1295d8745a971a94793a7c2dd589ff7c2b71a4d71c1e6","17354708d69221dcc11d442a2ae8d1a8fd9ce3422f52e63a29a599e2bc987d3a","7a4792c9dcf9466d19ba61ec3efd4f578e21f2d3035e8fa6a6264d3045083f7e","43a562d6822dab12c673c1efa0a3171d1ef69b949f676fb01847e1e5b56274de"]

Anchored

2026-09-22

Public log entry

search.sigstore.dev, log index 2907673729 · entry 108e9186e8c5677a06ea…

Expected log hash

bf9a74000249ba6e66b1e29aae9d8cb95c3400dc118569a80e5c0949f3e8ac62 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":"v1789969984102","kind":"published-quote","locale":"de","page":"theme:vaia/billing/de","quote":"Die App hat mir automatisch den Betrag für ein Jahresabo abgebucht","rating":1,"review_date":"2026-06-23","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","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 (b9a08f9d6d76…), 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.