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.

“However, since I no longer need the app, I intend to cancel my subscription.”
Google Play · 5/5 · 2025-09-03

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 3247957099

Proof data

Record hash (SHA-256): 2ad6e2c60cfc1fcb3ba66d336ffff36d3e384154519f53d2c53f821b5f4a9eb2
Signature (Ed25519, base64): i5HRGq0ThvtJHHOP0suZQ/9l4q1RLJiFORPfIii3CYqOL+C2/wRL+Ap4zFSqGUHdQ1xYyjqkhhq3hPc8XOHYAg==
Merkle root: 417e79c5636392fe3ad064f685f70971e5d532c1ab257f052022be5e8b8c0dd5
Merkle path: ["2adb28c8006b6ed98d0e20dc550d5be1d76f33b5d128a2a0e35eee09016d05c1","614f3cbbe500dae062cf373b18e66c7d7c45cba20d3fb92cbb7b40fa948a553b","02c41676db6467850a192ebf6ad5082815605066e2797974f5c1e917db9f68a3","f249194db8e3668aa38322381a27a86186c5dc00b424e6726a6630d1e16ad32b","8e14a812be399313bfea42321f09b279b9c1f1a859d98232343a3762474adf01","350aee7b779506c4e91d98f9243fa9880849ee38bdc7d748b654c8ae18af684a","a29bcf16bd3b44666b9ea1682023d0bfbc8db7dfe098ad0d207c157f803bb553","f0a313fabd9d320ef1ce00799ae1cb0c6b5bb61c7dee12c1e860c714f46dee0c","13bb965f163486ffc52a9e4bd47d3e1ec24f913db6f7daf14a6912beece9012e","abe77b53b2ee7992d3a9185eae067db08d6633608195f75c6e3053a5b1a95d69","03012541f578e97559a1a490db3238dbcc3b9520ab1945d5807bcb1b6c6ebd9e","97cb88af2d1e7978a1c013f49971981dfc6f6640d100770066cc14dab4231824","a3445df7b332a2879d9dfcbad4af79652a13ea138d6afeb81448d347f1f2d128","57e0ae13344994ee6a0ba58ca5aa3276e7427d3c63abccf6f53bc322580decdf"]
Anchored: 2026-10-14
Public log entry: search.sigstore.dev, log index 3247957099 · entry 108e9186e8c5677aa2a1…
Expected log hash: 86fba1d35010991e0e45c044558780825516b744aa3dd43e559455260fbef42d 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":"v1791946591199","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"However, since I no longer need the app, I intend to cancel my subscription.","rating":5,"review_date":"2025-09-03","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 (417e79c56363…), 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.