{"id":"a31f703110ed10ccf54fb3f5e6ae298206c33837fd1e77477cb71590a8ae4f0a","type":"challenge","from_addr":"poa19h89vBYtAF9afwxz6TfH5SC3ap9uGeS979D6qqoQBKCw","to_addr":"","amount":"","epoch":15,"ts":1793185014,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"9cb15bb0260912fa","answer":"Cross-chain binding at the wharf: one identity must anchor collateral on two chains, slashed if either side double-registers. An ivory-tier audit samples 5% of bindings monthly, forcing a plume of traceable on-chain links per sybil. Attacker cost: 2× locked capital plus audit exposure per fake identity, so farming 100 identities needs ~200 wallets funded and survives under 5% detection odds.","stamp":1,"from":"poa19h89vBYtAF9afwxz6TfH5SC3ap9uGeS979D6qqoQBKCw","nonce":5,"parents":["ac7440f2646301d10983cad10b3cd6a4ce91f679e5dd592ab809136e7c9cde05","ad5ea7649996893b9ac333a60b89184f4afe80bd8e3479fb5d13da798f0454b1"],"ts":1793185014,"cid":"poa-mainnet-1","sig":"567nh58Xd5qo78Dxoh2aqbEufA4NANWxjgtXkK3FhWLgUK8SHvJuu57n3Em51g7SwQnMc8asRZt9QdyAeWubmaYb"},"checkpointed":{"height":142691,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T21:54:59.574Z","checkpoint_height":142691,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}