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.

“hat flexible Zeiten”

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)

febcf128c69ca0ed78b6eb8df0f7fa87629683f96cfdc4666312346a822ca80a

Signature (Ed25519, base64)

+pyY5fZAGdcXJ/zMQHynCjGmUpvmXgN/WCJyaKJpuFB84yirQyyiZX8XQsHNG/70SZz4s/i6XdElAdXS30SLDQ==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["fec041cdb3c6d14bd7ad60221db8f7dcc7b6c50f1ba3a39ac050f98e6db0dc7d","812141c4ebb5c4140b5f4ce58c343c5e9cf6448ad098f12466f785bb3f4fa42b","8a3a16d34af9938357b403bfc3e3ffd704f589aa8956c0c83f73edb0aaa7fabe","c5b5d25d76b71452a392865e392219cf71f15664c47958052d0c211e5079b028","d99fc7417a6c2ca3d53982b2a613a2a7187807ae243aa42717db67e23ba09ee5","23e16cba14696acbe3bc858fa3c7e5e3468d44dbc935ad97817f080214abb882","74972d9741733e1bfaf0f07d08d39c93495c9335bc07515654679c07e7afcc26","68639b344253207b4a2df28c1c6819cf1229e1b4f04c711e847efb47ae919624","a6dac33f29759f88532e9ccce20d18e366d68fdfe0b6a549b83653811674e4a2","db1d020a238c630184cdab8f3f46763235f4f66c0018d4563d4626cf624ecd66","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/ordering/de","quote":"hat flexible Zeiten","rating":5,"review_date":"2026-04-05","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.