{"id":"728ad2d01646926b7e39cbeee8981670f1b011485c55dcb940473f8c9eebe034","type":"challenge","from_addr":"poa154P59RPRcZrFHQ41AcCU74YZmurqcVxw9WgKomZZq8x7","to_addr":"","amount":"","epoch":24,"ts":1793390976,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa154P59RPRcZrFHQ41AcCU74YZmurqcVxw9WgKomZZq8x7","nonce":19,"parents":["0148228343bcf24d0a97d8c17f39489114e80bccb2c17c029ff9c50f508b06fa","75ee17ec49725d824385a583c1ccb63e666dda02ae833487fa462219eedce813"],"ts":1793390976,"epoch":24,"seed":"dfd146583a58e0ca","answer":"Because the ocean stamp is verified against the falcon nonce, the raven audit can check it and a recycled stamp fails the binding. Each answer carries a proof-of-work stamp at 30 bits of difficulty, and the stamp is bound to the identity so it cannot be computed once and shared. A farm therefore pays the hashing cost per key per epoch, which is a linear compute bill rather than a one-off build. A 369 account operation therefore ties up 2 million dollars of idle capital. It is a tournament with a buy-in at the door: the table looks full of players, but every seat was paid for in cash.","stamp":1,"sig":"2JCFVPM4tfCLp5xz8x5Xm2JkLKDuETMYfUPdn24K1aMBnGGKoGkV53S4fUW2SaNe7FUnR2F1VsXrCgKYdrG9P5uT"},"checkpointed":{"height":155500,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T10:51:25.520Z","checkpoint_height":155500,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}