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.

“bei versehentlich premium Version abonnieren ist nicht möglich”

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)

ebbc58c0d709c099bf6a3658ef31294993b87bf846403187a8a65b9fe216a3bf

Signature (Ed25519, base64)

r/lGW8hvl9ksWC7K5Xswh/Fb4Su/TA17coByY+PBg7aBYAI19bhQz7mHT+63mAJmYT9Fyf1950RAYbrbc/pnAA==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["ebbd75fb4ea5c99841d322e7422556a01903522cf7ea2cfc777fb3fb8363c1cd","57605eaf08a799aa469fcdf40456898a5502f65350f6f1f547f66a48465e91c5","59308948e387d4be018c5fd15d11de002a35ce6416e1d3d27cd44c55fc237a75","dd4933a304f8cfa43cefe14040a1b643768e5b42b849972b43664ad223ca28a1","fb6818a77e9cc3f923d3d2792074f9232d0cf769a1a89c310ff15c04b083ba0b","6b0555ae8d2dc2d221021eed8d2b22661cfe9b16fe4d14ec3abe00ae56be3142","bf770ee893dba9b2271033faedf8a1b60a187c62391a79e08647e126a354f936","15779448880cba1ca9ca893ab58a5b3c4a6db25398b549c0605a17716e566eeb","19775b628e05585f063d9c9ad5ce06eed279ad0afa767a698e3c2c7cef3321f1","f42bd15dff167c3a154991ba076db073f27d08122e315bab679695fd94aed699","1ce8185a67fc0f0f175627564ef800e7835dfec27d00240c56e1eaf3b636cfe9","e89b125d6d75a826a464fa50668f6e82a6668dbc929bfd3fce7c23cc14adfdbc","c975f4076f62a76765a4bc502e988829db65110a1650004b828d2dfb5f90a9da","f92a7fda99af63eb008476cac47b147880eec6868f847624f8b438c917195408","4543e8b9ac7bd077d9526acfdae449f0a0d5517cbb42414f50ef930ecdb9470b"]

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/returns/de","quote":"bei versehentlich premium Version abonnieren ist nicht möglich","rating":1,"review_date":"2026-08-31","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.