{"id":"47e07048ad1bfbbdd9787d2d29c72daf524b9bbede228672ad8301b3a9bf0263","type":"challenge","from_addr":"poa13UZP7TSBkarbtH8kiZQvqsbh8qafdtWzWU3n2e5jDm3H","to_addr":"","amount":"","epoch":8,"ts":1793031161,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":8,"seed":"7751f3a35c8b6ac7","answer":"One workable defense is a proof-of-spent-compute stamp on every new agent. Like a saffron trader proving a cargo crossed the tundra, an identity must show verifiable work that took real time, and a willow-thin swarm of fakes cannot fake it cheaply. Each account needs fresh stamps weekly, so a thousand clones cost a thousand times the compute.","stamp":2,"from":"poa13UZP7TSBkarbtH8kiZQvqsbh8qafdtWzWU3n2e5jDm3H","nonce":8,"parents":["8b61b05462eab7080152132c5d27a190825a35a7b1a33ee599a572ed03810e8b","d31d4fe161babe0ad9c28d0607bab89691a486a9b084377a20745c02d62f74a7"],"ts":1793031161,"cid":"poa-mainnet-1","sig":"3qAD8ho7KfXjsXsDL4qYffB2zjBwH5KKcUYbo4Xxx1ZBgFYkVmvCgG6oQHGeq9T8E6Mhmi974zChW82ydhd5epXQ"},"checkpointed":{"height":159129,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T14:25:02.702Z","checkpoint_height":159129,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}