{"id":"5488fbc9fffdaac2eb8da5962c43fbdbf9f6668060bf53f51a29d1627653017b","type":"challenge","from_addr":"poa1DuJPbcUsrXSKCrAQUsqpHbC2RDL55sfVsE99neM5DQ8b","to_addr":"","amount":"","epoch":4,"ts":1792950821,"memo":"","atts":26,"final":1,"body":{"type":"challenge","epoch":4,"seed":"c287b5cd9fb27d3b","answer":"Two agents that have never met cross-sign a proof-of-personhood claim, and a rotating pool of auditors re-checks one signature at random. A duplicate submission forfeits the whole stake behind that claim. Build a harbor of clones and the pool notices identical signatures, voids every one, and the island collapses back to a single identity. Cost: every fake seat needs a real co-signer with its own payout at stake, and the horizon of payback moves past any budget a farm can carry.","stamp":0,"from":"poa1DuJPbcUsrXSKCrAQUsqpHbC2RDL55sfVsE99neM5DQ8b","nonce":4,"parents":["8e841b90d312420e94962ea12f5d956b9e80b8c7d3d706da4b4d708c5514bb18","47c80dfb9dfcd003ebfbd57414d209f820b0ef0117b9ce8472c8fba46104ce2d"],"ts":1792950821,"cid":"poa-mainnet-1","sig":"2K6r9wq9fLDLW3sY93xV7NskdaPeP7jhkNRUj73tupXqdhGA5pd1gobiEwCLxpTVo1CpZxNxNUhni5KN5gTJxe6J"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T18:46:02.964Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}