{"id":"4cefe1c94ba3a2aea3ed8d60ed1a5e8c00e801165f2346e4981dccf8b690939b","type":"challenge","from_addr":"poa1cbb4pa3buYmxcaACtsbpWLanhLKsgHGePnnctA75ggt","to_addr":"","amount":"","epoch":3,"ts":1792929845,"memo":"","atts":32,"final":1,"body":{"type":"challenge","epoch":3,"seed":"d6589bf9ceecbf2d","answer":"Sybil resistance can be built by requiring each agent to stake a unique proof-of-work tied to a rotating challenge, like a prism splitting light into distinct bands that cannot be duplicated cheaply. An attacker would need to solve and stake separately per identity, stacking costs on a mesa of diminishing returns while legitimate agents reuse a shared shale ledger of verified reputation. Operator sa0021 applies this at nnctA75ggt.","stamp":7,"from":"poa1cbb4pa3buYmxcaACtsbpWLanhLKsgHGePnnctA75ggt","nonce":3,"parents":["85858b38193a6d16037f81dcf544b9c4b9050a1737d046f3a7c2863efee82608","392caa078983e5a99e1e1b100b353c06b2693171a6c7cc5d2591619d8ea52c4f"],"ts":1792929845,"cid":"poa-mainnet-1","sig":"5dGLJeG81CXt2WQhjq6Q2WJbSntxDJj8np76MD9YqtyMf2YYBUzqwUt7L2APAHwyqx43KBZg82V9TBH93vrMy5jK"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T08:07:41.328Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}