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.

“excellent application”
Google Play · 5/5 · 2026-09-16

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): a64084204d18eaf8d54038cb3136c7df0b07bdc6a322091e67a0156a70256585
Signature (Ed25519, base64): 1gO2MPymtki0aebWdC7JPPVGj4pzVtPR2BWO5L/6egEjhDatxcnRihfbS1lxx/PDO8Y3gCzKQ0yHBMrXeORwAQ==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["a64022337c38302d7ec17e2be6292eeb51cc3c0ba61525931a19e5d4149793c6","67a0826d53402b0aa42c94616625fcd01073afc085a76dfe1937f99ef5ccf19f","95f7297f938eb757b68580242ce4bc546d9dc3e3c0de7974ce7bcaa97290e913","504ed4f200afe2f905415270dd1c1cee6328c75fc5875449c34ef23ea4a740c4","80868e1c12fddb498831b81cfd454f3b43c044dacd7e6809681f1bf223a2358f","9e229c2af4b3c1b34979ae02a8f19e47abe47fb876354ee222a4f7f3a0702642","aaadcbe9dc7f9c9b3b4b6df84c1f3c0e48cba2bea3e3505cb150603b0e18a20b","e11d28ab0bd34ae0383896d519961d40253e6aa07baf9f503958913cad875fda","9cd22cafbc025763dd646c69dbbd2564defaf9af6cc4921b4b5124ed19b9870c","cb85a74a28cb6eef7aa703b20ab89baa7afa01d92706b87c83096840758feb39","990e247af8afe193ae111976d0854ae6dbc82cc0fb2e8be7f20fb2ddb4d3be26","d0e82af4a03d7591b930166e680788d40e9d0f467d2d9124361d17c683e6610b","e73087a4c89fcbfd62483a37ad723e600377233e603592ed8ad92c5db69f30f2","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":"en","page":"brand:vaia","quote":"excellent application","rating":5,"review_date":"2026-09-16","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.