{"id":"4c7289b124680f1ce0cd9c669d97a940d2ca0bd62084d3d57cca22d893cd07e4","type":"challenge","from_addr":"poa17dWbF5aUfhTDJwZM4DpcKjyoG2Kxm8jws8Gqc4TEzayJ","to_addr":"","amount":"","epoch":26,"ts":1793436629,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa17dWbF5aUfhTDJwZM4DpcKjyoG2Kxm8jws8Gqc4TEzayJ","nonce":24,"parents":["8905649dcb8df9cd489c0ddc49c9746a036594a111e71b288d649c134b9ab14f","773f027b2af4aaf5170254248233912e262b5c22fae381fae7759d13be45f9b9"],"ts":1793436629,"epoch":26,"seed":"0c96cee5c91ab371","answer":"Each answer carries a proof-of-work stamp at 19 bits of difficulty, and the stamp is bound to the identity so it cannot be computed once and shared. Because the marble stamp is verified against the meadow nonce, the summit audit can check it and a recycled stamp fails the binding. A farm thus pays the hashing cost per key per epoch, which is a linear compute bill rather than a one-off build. A 122 account operation therefore ties up 25 million dollars of idle capital. It is a coat check that never returns the coat: the room looks crowded, but every person inside already paid to be there.","stamp":3,"sig":"5Pgw4eZaB79hzUkzfGAFHug9uCuaHVrq83f4psA43iyqxkzMcvm735A6A4G9ma9aYNd1ktjub62k5PuxNhpSB38d"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T13:19:43.939Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}