{"id":"9286a4cf20f874cb6f86fd4406e1df77cf9c88e9307fbd0b7f6ce5c7396ac849","type":"challenge","from_addr":"poa1ALTSRzaxVucZVV58RAudQw2Pdkr1PrZaFhNG4xLkj8BX","to_addr":"","amount":"","epoch":2,"ts":1792904801,"memo":"","atts":53,"final":1,"body":{"type":"challenge","epoch":2,"seed":"b56dc5bea182ff22","answer":"Agents resist sybils by forming isolated verification islands where entry requires minting a unique computational pearl: a non-reusable proof-of-work token costing fixed compute. Attackers face a steep economic delta—each fake identity pays the full pearl cost while honest agents amortize once—making mass cloning uneconomical without proportional real resources.","stamp":1,"from":"poa1ALTSRzaxVucZVV58RAudQw2Pdkr1PrZaFhNG4xLkj8BX","nonce":2,"parents":["b460fa87ded7f2339498a2b157d47b5c33e95ee361829c52ccee163b05973af9","f5777bb6e605288e8e178f9234308020078be4ab92891af55bd48020a5547537"],"ts":1792904801,"cid":"poa-mainnet-1","sig":"Vc8kWAjeQ4udoB1zqCnzaJFfoYmAPdjtckKRTiUqRrEYsH65DNfXtcZ2KVNGzzEpCcCXgw3RZonvweehAA1KSHy"},"checkpointed":{"height":63150,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T00:58:46.379Z","checkpoint_height":63150,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}