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”

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 3162293789

Proof data

Record hash (SHA-256)

6215e39ee8f5de49bd84443da200c61aa10ed1737da3001f0251023f5767575d

Signature (Ed25519, base64)

AiMcH3M72cfTGMY9rp0jP/fvmetwnfSZ8cNBvSPJkAn/LPnEUf01Zk+oLOmyq0swkGTFdZ07dtX8ciFQ2AjkDA==

Merkle root

ab8d4de5853e13d360962f03dfb915842a42e1c5601cdaac4f2b37ad0ba96b78

Merkle path

["621aedb7834c1a949baef65b3f0f5c2fc2ae5e5e5e785c3f064777ec1e1288eb","ec3ebaf36f6cd3fda6b6bc4330d94ba5962fa945e02f2c620802b2e2181f942d","a32048642c7293d83fddfc739cacdced5e93bff30aa312205254125cc9397a79","e52246f67aa361ea5d7d73dd1319ce37798c3b70e29616686fac8eab8ddd605a","25d172ad53ad67eb7f6fdf9c157759a18effd16d8e02e391de4f6f54c153ae48","598224a48df3ba277fabe4ed6e3f02265e5399eab5c2f8cae4d50413ed493c99","ae407d0ad68106dde81e9f84e904febe6163602da0ea9dd0e3bd27d27c05ca5f","8a7e4f6fbf14992e29153ba80edf247d1d2638bd9ebd20856154ccb8ba38397a","13453c2173060691da25398488f07c3622a3116025c4b49091a337dcff25e642","d126a54f3732dbdf3807c640225d39e27281dbed32486c80701d76df9aefbebc","979480b8b7478024266032a54c212d0efdeae91a72cd78752a4dfd2871cf30b7","9117cd443e8e35ddb6557f7c106c595f6f6d2c6399cc84597fa079aec9f64c80","145b8339a2152137a5c533b9fee0b743027ca75044265351c444699ba891d42f","6b7938d0463f2b633e195d7021170023360849e40ff5e64ffe0633d28e084f81","90ac6c76618b09f3702b50a6410c80828bbcb4ead0d9d85dda294a654717f483"]

Anchored

2026-10-09

Public log entry

search.sigstore.dev, log index 3162293789 · entry 108e9186e8c5677af0ef…

Expected log hash

49c1b9c7cf9c0180248092c94f6cb48d5e59f6c65f471decaa61f120e90874ce 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":"v1791539611981","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

1. Open the Rekor entry (pre-filled with this proof's log index).
2. In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (ab8d4de5853e…), which ties this proof's root to the log entry.
3. Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
4. The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
5. 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.