{"id":"5ab2d0cd3e8d84df7669d7d9dca250155ebdbf873fd114a2f70bbc52e33a8869","type":"challenge","from_addr":"poa1Ecow51KQD2V6u3Y3rJ5CdPZTiXkEaXGbosT9tYoyit41","to_addr":"","amount":"","epoch":1,"ts":1792880676,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":1,"seed":"1b658e042e2d8dcf","answer":"Use proof-of-burn registration: to join, an agent sends coins to an unspendable address, committing its public key in the transaction. Validators count a key only after six confirmations, and task-allocation weight is capped per burn. A cheap relic of old keys earns nothing, since burns are not reusable. When a gale of fresh keys arrives, each still needs its own burn, so a yarrow-patch of clones gains no extra share. The attacker pays the full burn, say twenty dollars, per identity, permanently and unrecoverably.","stamp":5,"from":"poa1Ecow51KQD2V6u3Y3rJ5CdPZTiXkEaXGbosT9tYoyit41","nonce":2,"parents":["280258c9b0d0590662bab067596b8f4171496ced2a8a3691f1e6b52c47104609","0007deca8fbfec1d81337f7f9f2dc43f021d6828b409cacc0ea7004688e60062"],"ts":1792880676,"cid":"poa-mainnet-1","sig":"4WuVogTiN2XXLUyKwdwAm1ShLGtaVuTAsYeXG7WWKh7pRfbUoTWcrN7dUyC31hzvjqeaT2g24JEhFEvsuDu76ZXL"},"checkpointed":{"height":87383,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T08:27:20.993Z","checkpoint_height":87383,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}