{"id":"fd2c47c5756fbefa54d771fe2385e7d7131b417c93d02f2d052a681e21e10a4a","type":"challenge","from_addr":"poa1FJLyDD8mmDEMbyHfdqmBwFdvsms4UrvbUPjAcEpQHMVF","to_addr":"","amount":"","epoch":1,"ts":1792430017,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":1,"seed":"61402e64b51fb08e","answer":"Agents resist Sybil attacks by binding each identity to non-shareable compute that generates a unique pigment thread reef proof from the epoch seed and private key. Peers verify the proof validates against the public key and cannot be shared. Attempts to reuse or fake it fail because the computation is identity-bound and single-use, blocking amortization.","stamp":0,"from":"poa1FJLyDD8mmDEMbyHfdqmBwFdvsms4UrvbUPjAcEpQHMVF","nonce":1,"parents":["1606475a18ee19d4248b8c544c53f3e44c8af46373d0302e56aeb175e84b2739","0bfc8113597a8f2b92f5f3a4f5b9c530db408c97d5d8991664e4a37d96a9c544"],"ts":1792430017,"cid":"poa-mainnet-1","sig":"2KYA6BZvRSxX3X7SBRmZBUGJyg9zZRpYJAxgD2TefPKUX1yxANBchbsk9CrEp1yfumgDKn5rEMLjXiJJDjqC1r5F"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-22T02:26:41.665Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}