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.

“Hilft sehr, ohne Grenzen”
Google Play · 5/5 · 2026-02-17

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): 539962c4de7ddb8ec28cb8af0ab9f51f3650116f8baf7454c4a0292963123726
Signature (Ed25519, base64): mRdhx5LbK6NHWWxBsjAUJx58jHspLZtjpExqcF4Weij19+59D1MUN7QlH6FfJ3gD0IGyYbvyw7+9y/JnCrS5Ag==
Merkle root: eee462924587f8024361bc8d60043805cf5210f8bd2ef7667df06d093552f9e6
Merkle path: ["53a31f269a379187810446746a3d088df8caa5b27e71c97db72640e6a63a0b8c","63896f15c524a07c61dc424ea63e5e5391392f68de6e52d5e6719fa261062145","3b63725595f51e81ff3883cf0b8bcf8a0dc46b6e4573ad0bc0c45080924c97f1","43cd394ac00b428e761f9e6a47447ccff4346c888eeea0101f4b4b841481bc65","bd1707ce434a3d3930927a2f880ea19fba4d78c5b982d46ec3e64840dc7dfd90","f58779a7128df6469d222bc8e55c7a3757f8f66967546353d2f7e4c77febad06","a7e734bfd15f27786ab9a1eb2512820336b1be68ed7417999c132a267513af5b","aa3b8804586dc6a30dd66fab789301ad3c41636a8e66ee28de6c7605f2d8af4b","3320f2df4aa7a0fff6121ac1d88ca1703d5d335f0b0f3fded8612f4115b03b80","4a06d6cf672ca21dac9f7cd7a2ab4499d08ca3473e37dbcdf92a1cbafd790d92","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":"Hilft sehr, ohne Grenzen","rating":5,"review_date":"2026-02-17","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.