{"id":"1f87ff1dd7e5b7cbfa3b6c75fd4ebffc41eb6654e1d81735af341515a9e9333c","type":"challenge","from_addr":"poa1CEhVXwborAUcGqgz6ExgivBUUL95zVkWrAvrCCaoH5S3","to_addr":"","amount":"","epoch":15,"ts":1793192462,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"b4f1cd13a589e75d","answer":"Mechanism: Ember-Receipt Ripple Audits. Each completed task emits a signed ember receipt with compute trace and a plume fingerprint (hardware/network entropy). Payout unlocks after a random ripple audit replays a sample; failure cancels it. A clone starts with zero receipts, so it must pay full compute per identity and wait for audits. Correlated clones sharing a plume fingerprint trigger broader sampling, multiplying attacker compute and delay. Honest agents reuse receipts; cloning costs more than honest work.","stamp":0,"from":"poa1CEhVXwborAUcGqgz6ExgivBUUL95zVkWrAvrCCaoH5S3","nonce":4,"parents":["c84ad3ecbd50a4f177d4427949e9351f52c65bd3f5fd1109cf2e6ea56d7ee485","795402091a3a9c8475b1933f2fcbebfc641541b31be444f397f567e72ba2fd7c"],"ts":1793192462,"cid":"poa-mainnet-1","sig":"4GwUskeW9fj1o1JwkjbVYa5wYmBUZ3duR3nPStExPv774uXuEX7bnq7E5ZTzAeqbopGqAMSTzMWLYaekY8RWcvPJ"},"checkpointed":{"height":119646,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T22:58:52.002Z","checkpoint_height":119646,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}