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.

“In den 5 Jahren, in denen ich diese App nutze, hat sie mich nie im Stich gelassen. Gute Arbeit, Entwickler!”
Google Play · 5/5 · 2026-06-05

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): bd9831580da385997d95f59c3046615aa27465d68884cc2f52b8538bdbe6bab9
Signature (Ed25519, base64): zE2Tg4cAaO6JAKn5kE3CwJxvSZ/xFD6uLZd7nEkdaUtgeGIxIxLy8qk9cVWnrmjO/aPY+947Ihc82Yb/OiFxDw==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["bd9c67b15581b3fb4cb7f3deb3c54f4c18981f21de377695fd8f3cc05e59a7fa","f772b73d72ed1a4b97e9fc35acd5034f8c0418c718c8de05163cf6e3ef5411d6","53b15dd709dfd898d6945e3a411538f1c2e4f7ad50c2bc2b19e0ac2ae929f5d3","20726f169766ab643a836c9f6e494702474654d18035eb7e6102397b87058447","8a62b4fdbe6a81c504699aafd048763bcffb710adb92964ae674c71cbe9458fc","ea1ebb2c06607277c010b2ae345f57a8b3d6cd7036ee771501894a8aae7b09fb","d4e4038965b67f174a5d478dc7cf4266de51a20c38e2e774058dbd9650176669","05d273e8e998e16e07f583ceac6e690e9176c58fc9ca24ccc819f23c1d4e9373","0707603be69f851f7f8ec7027dab5061caf101ae22302a1b7693832097e75ce5","8d1e6880fbd5e13ac0f1e21b875fa169bdbb8a65449cb7c0b2f9074a1e15e99d","d6d7ec5b8671612f1afda6d1c341da4ab277e6a515ef03b097a08ef2f21b6a1a","8e90fbff84453d26da9a25ba9530d677aecf62355e82abaefcef4642ecd6818d","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/durability/de","quote":"In den 5 Jahren, in denen ich diese App nutze, hat sie mich nie im Stich gelassen. Gute Arbeit, Entwickler!","rating":5,"review_date":"2026-06-05","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.