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.

“this software works very well”
Google Play · 5/5 · 2025-06-12

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 3138947147

Proof data

Record hash (SHA-256): b13272af5e8738f2dbfb2f8339c7ee3b28a2b365a224dab55795237800b07d44
Signature (Ed25519, base64): AQyW/aY2K1NfNTtHhui4NvFo8WW1OAonarHfAd0uvD7e68Sf80NO2ngGFiypTMtQh/nW3tqxDUIckZ8DMnHkDQ==
Merkle root: 1b26d1b85473caad1868633ec4c931eb970e81199eea87926818f3f1753af37b
Merkle path: ["b1306ef707e464051a779ce9c9b70c5b2b10fac30534434d9cca1c484fec91bd","72beac5f540b445bd3551665185220d678b213576935d210ca71a36a0239c70a","23edac58aa9acc764e5d62919aee5b2ce723dd9031a9adec00e422e7470a6aa8","2757de737d15c9507e19d554615aef87e52247541778c38f55c0f7d70f895076","3e6e88ac0b8a6a5b6eab21b657eee86b98894a1608b543b84ff114ccb78010b0","2a006441b795438c0c4b19d68cc241d2eb1f40fca1c61fa0648b4791ef90612b","dbaed926f8f8dd9fa744e1f20816541cf5dfb93a3659fcc218923eafbe3afe7d","eb5cb18f55ab62062c2d1a86b8077f64976d2effdec89dabf7d7ba2cf2dd442f","3b16f4d1b5b978a9140f88c169420156239f7ec16119e6d03dbb70d438ee9825","8f2390317e797770956bd24ce39107391a913c137ee2e095f2fc0f13d7a96445","1fe8a9ea53f8a8cbc48f25d9b08f8cb3122cb6b812c8e0035d39eb7cc3d49e24","0928ecf88354927cf77248647655f6a8bb07dea2f6f4911e0f34fbbcb0f1ef7a","c0dee208cfc82bb58ef8bfbdce70ae59669cc0fafa6229438e70014c20ddc06e","f13bd3931ffab245c82268d5388ec4e7a23a41a86394a369b97f89216cceb3ad","06054c91b82ccf7b99bb6b4fcb7c60afa97f93295e6829b75e5bf1efe9493e63"]
Anchored: 2026-10-08
Public log entry: search.sigstore.dev, log index 3138947147 · entry 108e9186e8c5677a2712…
Expected log hash: 8f66b765b7efcb11dcdcf57b81c46ed3317a5895f5b870638e23b76f1efbb2d5 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":"v1791425549743","kind":"published-quote","locale":"en","page":"brand:concordia","quote":"this software works very well","rating":5,"review_date":"2025-06-12","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 (1b26d1b85473…), 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.