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.

“der Button zum eigene Sachen hochladen nicht funktional”

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 3239939960

Proof data

Record hash (SHA-256)

4ac9af96aa6c91ab923f53a65a5e00e64ab603ce4e9cc7cf630497e8cd7a03a7

Signature (Ed25519, base64)

MV+CBfI1ophmEfV1D+OKwImF1D11WMs1AHU1b6cb0IWhbyqEaLrP9oGls5Mjueou/fq//rXdsCArKXCr3dhrBA==

Merkle root

954962254ff2eae9503796c02bd08deefa3a5722e4ac0b3981007e2b9ddd84c7

Merkle path

["4acabeb9ad993436614fdd7e24c57b3f7761611330ccd07638709ca927ea6fe6","0fd388d72635a12220a2523b1fe1b7455771c03efd24844c00c50bfaf118292a","f99dc2c0cd4483df9f69c0585f01a07210e5d8ddccdaab01fbcd852449b9055f","90dd3262869a08d88a54da52d50ef3fed6c3ca4acb6a31064f60c918588748ef","7bd52611ed1de0de71584aa0b65670fb7918a7674ff38c0f7074154eebe4c1d9","853e82825811b629ef7f5e8cabeeb9c890937274ff12420cc9dd6669859770e6","245d7f6f095131a5469e772d9d3739f702cc501008951b776094e831a7305cc2","bbf3d73257314bbc2056a462919baecf7a1c9b4dd5a4f20326a23a3ba3834aff","2c0bcf38d5a67acbf53aba0d6b34daee014e3894e7c50713edefa71dc22f7e7e","07c9c3ff2ad40a6a51b748f8a25173ba55a6aaf65a30e7972068693d1b77c76e","780157e889b8acc868bdc5fbd2b9f6d948cec0f255310afe76e4ec4bfc3a114a","37d889bdc912bd16145284899ed1544c934e2d5178cc362b2ba799bdeaadde22","07b2ba787804bc9fbb84c73bed76b7f65ff1b8c1694261a8264cf5f3209f315a","e7bbbee54f729cc449b73bfdd383c96b7b180e618c270037b5697f1fcc75f254"]

Anchored

2026-10-13

Public log entry

search.sigstore.dev, log index 3239939960 · entry 108e9186e8c5677a0082…

Expected log hash

28fd9464b857a07e61931e67235e692cb8af33d7541a60ca163756a54a64e9c2 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":"v1791859824762","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"der Button zum eigene Sachen hochladen nicht funktional","rating":1,"review_date":"2026-07-30","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 (954962254ff2…), 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.