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.

“Had to spend the beginning of the study session looking for a way to review the cards I created”
Google Play · 4/5 · 2026-07-15

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): d6f7a6cb28068e43028fc32f45566748cb8e7b57f1239929dea8e83aeab7e034
Signature (Ed25519, base64): lRGSDtQYf4u71VQoJzyX8sM5AgcYzQpuBiEjXaRjEJjVl4vp9qdyHyZL2mGmqxjsYnh6F+siKfg9BNOoDSB/Cg==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["d6f5b01705c30d27e06655096c33411773d5d8a4a38e5fd484877145c1c90da9","8060dcf44a7b48ded0be793a66cd5e6d9d5bad6a4bbfb574a9bacf73cdc7d39a","2207b98109809a1792ad09e2586b7331f0f826e51fb6ff0091e092e4e9df7e43","df30c29fd09149b5f7c54be22a161df38fdd04ea37af20083ee26a34c5945792","8172e070123d6df6e9dc07ac72b4219314aab98f19ee06499185142b214e4206","d5ccfca9a29e3005ec7f72e233b791b7b7aea211a87207be51d7ccf664cdca9c","30b4aab76c1c34a023e857708f8dfa3f0b23398238a4577ac21a47ae0d09470f","ea7ab1e2bcd64e9f014509a6931d662254da9870bd533fd36733fd623da9bb6b","e5ff6e344d4638ab8036e0d981436a700c5bde6938891e5d86821644ed0ae12a","1ef2d32327dec49b078f60d82e96fe63ff04f9e28e1f6ac4531459cb8e763e04","5fa4d2509ac4b266680172a1d644b9603830e2992eb99b956b8d4389a86690d7","1324e7f8581b1cc3455b81e88efce3958a5b23eb7205ddfacaf930e32b10bd47","ff0ce3b59f4b6fff6b806e01d20d764fb2b7a5651693c19ab4bf8a8b5ce5f968","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/ordering/de","quote":"Had to spend the beginning of the study session looking for a way to review the cards I created","rating":4,"review_date":"2026-07-15","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.