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.

“Warum verschwinden einige meiner Karteikarten, nachdem ich so hart daran gearbeitet habe?”
Google Play · 3/5 · 2025-09-01

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): 977536aec55f61e602ff4199586094d7986c7aa058742f903909e901b2d4df62
Signature (Ed25519, base64): b5cVV/8ISAXThHcXSq5DWza9aGNGseqG+TycKofsH6RZcvKu8AExL9H89maQnb5YPkuy61Phdbx50zbCB4wQCw==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["97719e4ec0d6b914ee670d784bcbb156af6e535e1bb8a87202efe2d64ccee01c","d81e860c3756ea9f36e4b7cec36c2b19af13b422cb812d6c212258f1a02a733f","12b05c1a6bcbc850a4daeddafe18dd3e251a968d8edf74052218dfca90130cf4","f9f4025133f24d3595efb61c8aa359a6f2ff51a58c859b2024b52d1d05a23256","907564a669dd182cf94babef5ec19beab421575a8c0d2b670450a842376c56f1","5db66aba3b33c365fb3b2ed1e03b3070730d912f936bfed75545b49862929b84","d4d707feccf5c0edee4676a5bf833abb19094393a3e9ba3d6c1091a013ef38e5","9ca54e4b1216f5ef3c02547dc1f6f49aabd035aeb41a1de9db8628dee9732da5","cbd18b0ddbbf026b8eff929835930bd12ec2183df6e50ece218d62236ef5988e","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/durability/de","quote":"Warum verschwinden einige meiner Karteikarten, nachdem ich so hart daran gearbeitet habe?","rating":3,"review_date":"2025-09-01","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.