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.

“vor allem bei der Selbsteinschätzung von Inhalten beim Hochladen von Lernquellen”
Google Play · 5/5 · 2026-09-17

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 3178600936

Proof data

Record hash (SHA-256): 58abcd6fcdeba0819984ddb9baa2cdb46070847a25a19cc1a58fb81c6b5d249e
Signature (Ed25519, base64): 80k8iBC1ZNi0W2zZD4b/6wfYBlUBZrb4ItCd4KGW7DK0IQvV2lM4v5uaNPBfQd9YXLEFTIIXo9af7o9bnr/hBw==
Merkle root: eee462924587f8024361bc8d60043805cf5210f8bd2ef7667df06d093552f9e6
Merkle path: ["58ab5119ecc63b8b51e802cf684bb9d3669ce0d3c5a113ca5d4e54fdf711dbee","a516e340525edbb2e957b2275b7505a4ed3479dcd622b6b28e3bdc4ed0a2a921","d0f806d3cb55ce0eb999b833ddbbdfdb9a215e617eae816dbda2dd7cf180a6c2","e38282f753433d6a17f3d7675d4a68bd5a1c1258999334e978671f2ccc830c24","7e9d6e580fcb5c6af214ca14f9b9f79e0c5add46cf217e4f3d21865d29aa0db8","d34e54d7057cb4be384f51a4c0a28b08a5dc934172b08e5175b76cd2a0e46302","039983aaea4a7eb1a99e886d1b8dbcad9df5d82dfbb771d488921714d5cdd056","c1c7e8e0b4e4bea6127ddfa627b82924d69116fe090d35bafe637fd4a06544fa","5e73dbd973f616a2c4639b7bf7c1d00c8b281d3da51465d7f138ead209f79c31","14d8c94fc2c1f683db94640bb14161805bf546c4851c89b6fc260f54ed29dab7","a272ea85631737531680457c069a82b977e8daa62af41dc864cba40b587da483","4379fefad16ae8ff2ba5706e6ae4b477d1b2ce3cfd6e873ab8243a37cd5eee04","2a2a0e0a04556444a1f3e56af70f8f7d735501b2d557278ab2ea5948d291f4ab","a445a39a48770a8fbc5d87a405ed660d401fa810eac6fbd1d284a96f8c7d5503","452f4fcbca19997a15e6a6869c50e026ff02cb90a6ef21da106ee0457e55941a"]
Anchored: 2026-10-10
Public log entry: search.sigstore.dev, log index 3178600936 · entry 108e9186e8c5677a6a91…
Expected log hash: f3dccf508afcb5e89d56dabc8c5aead85de215b1b896d057d463ea1c1bdb13a3 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":"v1791606586319","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"vor allem bei der Selbsteinschätzung von Inhalten beim Hochladen von Lernquellen","rating":5,"review_date":"2026-09-17","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

Open the Rekor entry (pre-filled with this proof's log index).
In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (eee462924587…), which ties this proof's root to the log entry.
Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
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.