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 works”
Google Play · 4/5 · 2026-04-13

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 3140627354

Proof data

Record hash (SHA-256): ef1d56b11305cfe09b5ed67f8c3295527afd3b344f6da6176e324ef222bb4bc4
Signature (Ed25519, base64): DJjrj76ETrSgFaO7JbVobUuBmoKFIew43f3AfM7D6NwRG+oGyt1c4OjSUfJQZM3SycH647Km5rjXtmlmrpNIAg==
Merkle root: 7e5597bd3c162c8b6d828ec7450367f642ce11ee386de414b88376dcbb621ae5
Merkle path: ["ef1fb1cc738267a38d49e59104998edf332837060d6b33876dbf3ec148b2a5df","1f08ebef794f5faa1336bb82de914b8a9440ae63a0e364167f804482ec5f90dc","74fc7b81fc49ff1c6d3fd33f7884eceaa65e95c0bd0661f114849b6b384956a9","b4868ac757a010d3f1a3e71a01d6aaac8848e16660d48f71cccc5c5b1d287c6d","13fea43808b8b424dce66f40890c8e61309296a6aa420310599590acc4361bbf","d62b00c3c86621d1d3d024be9c71213c056cd1d33aa50f7d43c2025beea61658","b9752b840185eb5c87ab95b4d734d3c06d4a08ed8fcb3b67c2dfaa25ace386ae","a9447207d9356f7deb19cf6cb985b82fffc4434cab5fa3bd67f791f3ac76e4d9","d418c64bd0da4f04ebdeff92008a38444f2b78ad12b11621fd1b8a01f2bebc49","88e9b4050ef9c575a026421e7452a672e7954c2f5a1677dda49956360a135ac5","e406b58f907eee264fba5bef5c53a1eaa0c1a813d7d0fb0b9b05db467600bfe2","712c122153f9e368549fe091086e305fb889467475d7dbc10f66c46c3ec70829","3fa77f30bb4ae3659981dff326c7b1ead82f840aa815dc4f4cfaa848f2034350"]
Anchored: 2026-10-08
Public log entry: search.sigstore.dev, log index 3140627354 · entry 108e9186e8c5677acc98…
Expected log hash: 82c9bd063e624267c60865e2416c3d714724e2c3b18c4773424cdf17232dd6f1 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":"v1791432333296","kind":"published-quote","locale":"en","page":"brand:concordia","quote":"The app works","rating":4,"review_date":"2026-04-13","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=ch.concordia.myconcordia","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 (7e5597bd3c16…), 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.