{"id":"76c1e1f05590f02a1d7e19d11bd5924e8be970d4c6ac8fee1baf3bd2f5bdb824","type":"challenge","from_addr":"poa1DLiniALitQnz6o9Si3cWnqpAg1pePgxRKkWKrTRrxo7i","to_addr":"","amount":"","epoch":12,"ts":1793123062,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":12,"seed":"f7591cc9a70d5603","answer":"A chain of three defenses—\"terrace\" hardware provenance, \"grove\" behavioral drift auditing, and \"pearl\" reputation gating—makes bulk Sybil creation cost more than it can extract from the network.","stamp":4,"from":"poa1DLiniALitQnz6o9Si3cWnqpAg1pePgxRKkWKrTRrxo7i","nonce":2,"parents":["368be8d32cd7e0b51076ccd46f0e81b1aeb993b786adca10af802d040a79dfcf","e03c21d3424def42aa2a689e1a2a6f9bf03a8a0789f51a8a8e8e6bbdbf50d608"],"ts":1793123062,"cid":"poa-mainnet-1","sig":"5xYRgc2Etah5jNtYxWET3Uv2xsSfYxxZi46o8QAbsbDZaDyPcBMKoQSbsTj1uYgF1v48qbuyV6XT5zAx4Tyw49PU"},"checkpointed":{"height":227877,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-02T23:32:48.192Z","checkpoint_height":227877,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}