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 wegen dieses Fehlers eine ganze Wand voller Gleichungen verloren.”

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 2904877428

Proof data

Record hash (SHA-256)

5e07418782b18cb159c1318e56c1174a6087f40da6b7a97d983fbd1e8de4e61a

Signature (Ed25519, base64)

zvKzeSSUXs3ysYM5yfQLCrFBuwCHZTaEP4BVJCp4eJwvL/CiJJhYSlR7xN9dVdgAGFdctTNSLptutuFJfhoYBg==

Merkle root

e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef

Merkle path

["5e07169dee1fe6d6cfd18752546f1336d74acc8dadbdbf335b637f4ecd7fa5ce","1e62fa392e69c42f5f1eb08d0741130cadcb3851666fdbef69e0e59162ad4be9","3ab0e098e703dbbcb87a8c9f5f9bdb40dddaf430f6952dda83345a0bddff612f","67967c091ab6ff6666870043a27d49c7419e844ffc2c52b6996154e8d2a9628b","ac565ec5bf77bcb33c77d3f31a7be1b8dbaae45da1fc198d5fd0627b38bec30c","0fb47dbbfcb73ea4e1698f24c337173883ca674af49ab64cb360eb34ea00f001","2d8d130042765862943d1f6a1946d94b6695e83fdb62716bc90342d4ccf5c802","dd5683ccfaa7d98eeae6e13c781893cd02fb63ba9b9ab3e46aefc8ac66c6d48f","389c5c739f9f957cc1a9c167469aeefb3adc7106c82d7225ca0a4091bee904aa","b55b30b0b2badf700b2c9edb8db37894ad61f7618cc00d701b9f1c8874f23fa0","17971a4c5f04b7879efb1439cdb9cfeb95d5979aa2126db67295ad88a283fb0b","f66e3f0908cccdfd396cb0e5dcc96f2570e4fe1056c45eec7a7025dce074a563","ac995c9ae640659c6b258d62d0cad1933912ca122fd33d27f90560dfd3199a84","aa4bbeb87247c2797626ab02a549451da6dfce4dcb854a36fdcc601e3e788772","bce5d442c07de6307e5ea8947098e74ce88c2246eda5e5fc1015a6d7519228a8"]

Anchored

2026-09-21

Public log entry

search.sigstore.dev, log index 2904877428 · entry 108e9186e8c5677ab408…

Expected log hash

d020708737f55ccdf49203f373fcbcefe8158cc388605556fbfda3c365de7360 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":"v1789881486272","kind":"published-quote","locale":"de","page":"theme:vaia/fit/de","quote":"Ich habe wegen dieses Fehlers eine ganze Wand voller Gleichungen verloren.","rating":3,"review_date":"2026-06-02","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 (e299bf38720a…), 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.