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.

“The app was actually better without the AI implementation.”
Google Play · 4/5 · 2025-12-02

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 2904877428

Proof data

Record hash (SHA-256): e90778bd24b24ddcfda461857c2685c44d5a33939ec8425d525f4ec8fefa2230
Signature (Ed25519, base64): CadTy0D46BvcLs/eCF6G+pV6i0o91ARGv5+ALKwcoautSJH0BrYFXI3QWNt9WYw0mY69zVGVQeC1nRatSNsfDQ==
Merkle root: e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef
Merkle path: ["e90c37992d95311d5913a38f7dce258bbc7182d221373e64be13d3b762b2689e","19b87096a8211133bc9313ebd54faf059107ded82aa624abbc81695e1624230c","cc201a0c0e807473b05e3aacb9e37e2f6148d2c7cf75076b3c387b498b06b099","5f41f357f7b381aef871dc6cb6220ee196484a004e01c554fa5bd84bce7d91bc","579981eec5afe28e64c50fc5a541415da74c18f1436d1318e2a164a8f9151dd6","e82e34d6e19a33db07e6e56bab2ddbfbabab4c0e63ce04294c8404c5d3f31c98","e6f87b9aefb1b8bd869abec2a9063a5e7202ce559b0ca1fdbe0a81166ac6dd00","b46c4d277567d5528c695d4e4370ab37ed21d3b93f452b2c7c13e472766d84de","631bcb4f089608ae873cc828a634358b8eb7bfbea66b5d560e711fb4962378b0","85cf02830a8d5647a5f7705ff7da2f830a119ee29dc89474d5bd79676cc972df","61847aed1e15fe38603f3749ed4f967e83902fabcda16f828dbfb3db9a44d565","d28ed21d4373cfe7811429a5d4926ac987665261fca2846c93ddc2c90e391266","f95e3a68f572f5650a4093453e2bf28168547fa91a01ce08e539b3d7016a3f80","53a8a23597d45564e495678bf6125e41ef42f347693c924494330dab53ea1e2d","2a462314156907e42d6f0d96eed96123f1d79516aef73ed189d9f5466556b638"]
Anchored: 2026-09-21
Public log entry: search.sigstore.dev, log index 2904877428 · entry 108e9186e8c5677ab408…
Expected log hash: d020708737f55ccdf49203f373fcbcefe8158cc388605556fbfda3c365de7360 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":"v1789881486272","kind":"published-quote","locale":"en","page":"theme:vaia/durability/en","quote":"The app was actually better without the AI implementation.","rating":4,"review_date":"2025-12-02","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 (e299bf38720a…), 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.