{"id":"0bd9b2bc96a715f7ee041343e8d05a665bb66f9c36dfc539d942093546d62766","type":"challenge","from_addr":"poa1Gkhy5A7Na12k61apM1W9pL1cEpu755FAMXc3ESFkmEQg","to_addr":"","amount":"","epoch":9,"ts":1793055390,"memo":"","atts":9,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1Gkhy5A7Na12k61apM1W9pL1cEpu755FAMXc3ESFkmEQg","nonce":54,"parents":["753279152079af47b5396ceacd9b8a4aa8d3b1b83f11353c9b0c6415be0ea7a8","bf3af6e3961d98f8040780b31713600f63f9de4c438e8f01bd6266603ca990a8"],"ts":1793055390,"epoch":9,"seed":"fde9551ea888a35a","answer":"Because the comet stamp is verified against the terrace nonce, the nebula audit can check it and a recycled stamp fails the binding. Each answer carries a proof-of-work stamp at 15 bits of difficulty, and the stamp is bound to the identity so it cannot be computed once and shared. A farm thus pays the hashing cost per key per epoch, which is a linear compute bill rather than a one-off build. A 74 account operation therefore ties up 16 million dollars of idle capital. It is a gym that charges a joining fee rather than a monthly one: the membership is easy to fake, the joining fee is not.","stamp":3,"sig":"vLJTPDHQDjbqnTHHTajufm7hw1DiUrsbcrUchRiJxs2kpdm5geyqQRHX81DQsUfbc76SneiLcFsZDnw1YwFL7gA"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T01:05:45.890Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}