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.

“diese App ist die beste Karteikarten App die ich je in Benutzung hatte”
Google Play · 5/5 · 2026-01-09

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): 9495f7847d74ee17cd8cfd1680d6ee0dafdaa1b396f15ebef2bb925e7b17f729
Signature (Ed25519, base64): TKrgdJs6TZpXAlWHz/wLNgSrFVWq4otJwVFcl/LOPTFCxAw4plvYiq8rePqGH+RsWA7jTMsDUHxooAmkEs04CQ==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["9497faa68507fae3fcf3cb79a13ee08689c6b320212d545e36804898e04e46f9","2938868d9989761491a206e0756a62a3f302199f5fb7586e0952dc744f7d209d","74b6f2a91b1d20cc3634ba495f6dd3f8e452c6f9b7f7a5072d0dfd0b8fc70390","baa0e7fb8d8aee5bf08151546ebaafa328c01518913fdb573946a5c426123b73","6d35ddd0f9319498664d4bfe96155668182d16597a261dc1250090b5f99d60ca","ab76bb43ddf78c269c359dfc95fb33b762cb33adf9247f61a1a0bd94b5a1e789","65bc3ad6161d7685bee1952d02b8b3ed95b89bb68bf508081da2ed9a69e9d0e0","142e25bc824183c6936f339dc7e17c3ee1ce2fac42f65dfa5595b54000afbedc","8c6336991436b2e0b5843ba837b459328a5bdbe47e12aefbd1853b1182f7d24c","b02987b8805ff97881bf8bd02156f427a4bf028280e5bc4b4f89b2e8d8e3f784","bf77cba02c08849fc4a9dd414e0e15c17e1f6b56a0b9c25793199682cc31bfad","86f8c9575acc759d5eac58ad776858ebdacefb73351960cc2bdae6ffdcc2483e","e73087a4c89fcbfd62483a37ad723e600377233e603592ed8ad92c5db69f30f2","05978e8b9ad5fd39833c65b8b951e8c80cf426334c441fa8a8bff8eb8eeaf534","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/delivery/de","quote":"diese App ist die beste Karteikarten App die ich je in Benutzung hatte","rating":5,"review_date":"2026-01-09","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 (b9a08f9d6d76…), 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.