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.

“es gibt dutzende die den selben service kostenlos anbieten”

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 3220367991

Proof data

Record hash (SHA-256)

4aa83d66abc3d301cb5cac1bddc8581028179f7b41d3dd3311708aff7b9b5550

Signature (Ed25519, base64)

5U6QFY8A5fWQuYUVK3d/w24ZSCUgYM2RvimWkBX9i1lxL1baveixC+F50iFW4XvAuVyUbPFEPt24SlyCeSi/Aw==

Merkle root

8e481f891fa4a8f9e77c0279ca152fab4383b65a50decc840d9fd7569bdfbaa3

Merkle path

["4aac16fe9fe96523fb7078165c146809aadc70e425747285a991cc387e214b5f","b4c66d3fc27bbe7fe4dd5472b735bc4eeba7c6c7a4c7c691e38b43ede4a6faf3","c7f0e6689e060a1d7718f3a47325bba46468fcc10a93a0d8f735a456379d223b","36fbaf9cf607a58252609d5749fb8ac305ff7cb2190560ca1830f10f1646c54f","201a0bcb9cf98269d973f78541881ba1e120654506eadc75b04e8eae8e30b002","ba82520c6cdf77472cde4bc35d0dcc3d3726d00a27d3750c8c1e2cebc4440271","4efd18180e280b35481fb52efda42e49ed7d7ccd7c1c29de62814d18237dff94","78a460d3f0f7b986b7498b535bc95e06bc223901a15dde7ea188d85f8cb722d3","64f5e53d998adab4dd14bfe5fec3bdb7fb6af9159e4db86374418bee42832e1b","2d42b31f359024c3abedd58b8250aacbf22f51e9cfbbf376455d69b6923062c5","b0d19eb198ae92cef79ff7b06a3ab9a6d60fdb5502f9f4962c90f48d23c66b88","3b4f21b826cbea2d43ed04a02447fd6a5c5177bac5ab8f0646d2865e69ab2bc2","a8a51e6cf51feca9c73f59ef001af57f41b1cec2b5f25963206b5df2878ba531","391099ea13ca712ab4d3c0ebed9ae37f021122ce33d031a4f3442fcba2038ec0"]

Anchored

2026-10-12

Public log entry

search.sigstore.dev, log index 3220367991 · entry 108e9186e8c5677a60ce…

Expected log hash

9a2b3ddad9c3b29dc171a15554fc81f3d4710c01a7565bd2f28b92e7b639f6dd 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":"v1791776812348","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"es gibt dutzende die den selben service kostenlos anbieten","rating":1,"review_date":"2026-09-14","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 (8e481f891fa4…), 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.