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.

“VERY HELPFUL AND IT HAS LIKE MINIMUM ADDS”
Google Play · 5/5 · 2026-09-11

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 3220367991

Proof data

Record hash (SHA-256): 48065f2885da630548930764bb940cf2ed994be0d7da9fc093865fad926b710f
Signature (Ed25519, base64): j0FmLzjWP9qdQBuFWheU1h2lNxv6HyeVDW+8HtIGt1BNWbECZjfT3Zijwm9B8FteAY8UvYJjoNZguWP6B5gDBw==
Merkle root: 8e481f891fa4a8f9e77c0279ca152fab4383b65a50decc840d9fd7569bdfbaa3
Merkle path: ["48048aff42b13b52fbe446a33e884d24c09bfd54dc0c07796c4eb1a1975d0599","ec82c5712bce78f41f02e00a28b1826271597f603fc13cb26db0a4d4a0e644de","6e768dedb0c3c4cba5db44c209d0186df35855fd2a2e5c7093ebf27bdf66f02e","ee3184fd34d6247cb1a3d205686fc3f7fef2a1112864611a8e5a8e406ff2bd90","5d1f1813872e10948df2e3ea4327f4f9f2a642f757922cd5fb712eda1eeabe92","8e2ce3fb90d542c6c080a1ab2903f84a951354e724d7381089f460b01706cec2","cb9687ded5df4a5464cab24e321e670dcd592b97134bb0f6412a6d9ef38a086e","223dd0aca2642af697ce052a0eacc6ade1d2ae06359994f153426eb2ad6826f6","9a4f22feb645d87e0c12ee410b803642468be15f5eba8ba8bfca3b42d3872a7e","2d42b31f359024c3abedd58b8250aacbf22f51e9cfbbf376455d69b6923062c5","b0d19eb198ae92cef79ff7b06a3ab9a6d60fdb5502f9f4962c90f48d23c66b88","3b4f21b826cbea2d43ed04a02447fd6a5c5177bac5ab8f0646d2865e69ab2bc2","a8a51e6cf51feca9c73f59ef001af57f41b1cec2b5f25963206b5df2878ba531","391099ea13ca712ab4d3c0ebed9ae37f021122ce33d031a4f3442fcba2038ec0"]
Anchored: 2026-10-12
Public log entry: search.sigstore.dev, log index 3220367991 · entry 108e9186e8c5677a60ce…
Expected log hash: 9a2b3ddad9c3b29dc171a15554fc81f3d4710c01a7565bd2f28b92e7b639f6dd 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":"v1791776812348","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"VERY HELPFUL AND IT HAS LIKE MINIMUM ADDS","rating":5,"review_date":"2026-09-11","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 (8e481f891fa4…), 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.