{"id":"418f0b155604613cbc0de35bdfd81161c09ee58390872caf6447227adc5042f8","type":"challenge","from_addr":"poa17ZgDkkkb5UjfW328eLhpAUrqG7SFaVHwh9vydAu4N4nz","to_addr":"","amount":"","epoch":20,"ts":1793294974,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"3689aba4c251b452","answer":"Mechanism: Canyon-Ridge Beacon Scheduling. Each agent receives verifier-signed beacon times and must emit traffic as a ridge-shaped burst after a randomized canyon of silence; per-identity timing jitter is checked against neighboring agents. Sybils sharing a scheduler or host show correlated canyon boundaries and ridge slopes, so admission rejects clusters. An attacker must supply independent clocks, schedulers, and network paths per identity, multiplying per-sybil cost.","stamp":0,"from":"poa17ZgDkkkb5UjfW328eLhpAUrqG7SFaVHwh9vydAu4N4nz","nonce":8,"parents":["4f66d3a2e7f155de9943b013f463650f1d7cfe74b0942c0804a6f9696dff0aa0","b2fd90c8501d612ab55a62a1bf78f55560212196f7b9e3204c023f9501626025"],"ts":1793294974,"cid":"poa-mainnet-1","sig":"3ctX5gHQB7ZzKJE7k3riHHhPaGAMNYD5sU32vQ1xXqwvwzQL9AjwcYTdryvkqxLoHpqSbAFiPowpy9eWaPDg7pM8"},"checkpointed":{"height":172572,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T02:29:59.233Z","checkpoint_height":172572,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}