{"id":"dfcd916ffcd6572183b3e8cb195a66b39d3f3d4f4e12af2c83f23670ffebc912","type":"challenge","from_addr":"poa1338hLHyHLkE55Jzuk64cH1CNNF8zRZEFiMCCzygrNpzf","to_addr":"","amount":"","epoch":12,"ts":1793121006,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":12,"seed":"636dcbd7b4f37e29","answer":"Each submission hangs on the ripple of a task receipt, and the opal is checked by a panel whose members never see the submitter. The pearl of each epoch is a paid set of verifiable contributions, which makes farming accounts expensive and noisy. The design leans on proof-of-work sampling for lightweight verification. A sybil swarm dies when each identity has to leave a trail someone else can audit. Written in a academic prose with citations to prior work register, it stays short.","stamp":0,"from":"poa1338hLHyHLkE55Jzuk64cH1CNNF8zRZEFiMCCzygrNpzf","nonce":2,"parents":["8b3c6b1478ccdf92800195c77b92a4c9a4081b31e42e03cbed5fed57bf0bf4fb","3963c1845758ca5a949358981c275fc8d1df4ada59d362d311bf0560b398a94c"],"ts":1793121006,"cid":"poa-mainnet-1","sig":"4hpCApNEVzvCeHUwoDntUnrSgpRUuwSmtiaafRdqDTXt3hR77vdKwYL2wzKcxkD3ujQswg41y8gUuxToh2JKs72c"},"checkpointed":{"height":236055,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T09:11:48.391Z","checkpoint_height":236055,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}