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 2929513415

Proof data

Record hash (SHA-256)

c46b7219a7b8791fe9a5dc6bfae5fe5a06ea7d1c586c2df0723659e36350e3c2

Signature (Ed25519, base64)

MBaT6NRfHlVZh4KMqT18APr0HDBbcSESQZvWngS2r0u86LhhgESQKxSLrak8rXZyENMXoM6iEVYR5NIDeIkJBA==

Merkle root

277f678086a68384187ff29b395b0fdaceb8fee69b57cef3cd060bcd7a85a6f2

Merkle path

["c46e25c09ecc4bc9744c055202a14bac3965dbdd902924639a4bb3edb8c5f570","9aaab58ac5cbc31ea33ae1d8a2f8d9084b3f87c900eed4773c7205a21e50b7e1","6c0f318846912def631566e298df9c5e754ca020caa7e53d6293c46cb9125530","02d2c97a9145469cbc428431fe15db0673d885681d11344a92e9212eec87d05c","2009d79f285e173e29ebe85d4e25795dcd0d329b95108351813542f42a327e0b","9f37721276feea1406599e5fc6884d6917d696d62c5c492869eb81eb6195df9e","c34256975471c93d3e4d108302d23a0543d7fc51b9311a8804a406c93d65d4f3","5dc4eeed033275af6ec5af48e2c40d2ce81ab177210d84d73e3fe7367b570724","e8714c1931756b64e2e09adef8fb585d1f5e7ce41c62c07d8362226380d00d1f","414de94075028ef5c83eeb14eb57cbef934ed384c851ad02b89aac8dbaf4a4ea","8a606b38b3efc578a0bc446ec2a700489210e286718d1dadd7c2feeec3c8d538","e02085f24285b60656a92b32c21ad5968537b2d9f76a4b93ea90d7a9c4de494c","f126b261631f378d888aebce7fa4cade2c31c033110cc285d36a18406560d0fd","086e176eb6519c51f791fcd7d1f1cf11b9af8b1ec6cdf6772acb83e13e1da912","33f0c207136b5e5f15198fd5fee5ac8599f8163ffe39734a8f7f2847e77c41f8"]

Anchored

2026-09-24

Public log entry

search.sigstore.dev, log index 2929513415 · entry 108e9186e8c5677a8264…

Expected log hash

9e91de35fefec2dcd249a303ecf0c84a118a9b2cf5b39f5a9ff4368de67598cd 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":"v1790137911951","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 (277f678086a6…), 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.