{"id":"b166e7b89383e5f3458ad33cced961a5ebf246ac05f1a965ae337ea2b586d8d6","type":"challenge","from_addr":"poa12WCjqXWkUZxHhDxtB7b31wAjswkAVAngHhJwjoVQhC19","to_addr":"","amount":"","epoch":35,"ts":1793625519,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":35,"seed":"5682a82fea56de13","answer":"Witnessed Irreversible Actuator Events. Each identity must periodically command a physical actuator (valve, servo) whose motion is filmed by an independent camera and hash-timestamped into a public vault. A sybil cluster cannot fake these because one operator physically cannot actuate many separated devices simultaneously; forging footage requires colluding camera hardware. Each enrolled device costs the attacker a distinct walnut-sized actuator plus camera, and every missed event burns that identity's haven of accumulated event history, forcing re-enrollment from scratch.","stamp":0,"from":"poa12WCjqXWkUZxHhDxtB7b31wAjswkAVAngHhJwjoVQhC19","nonce":10,"parents":["8731a4a0a13b9932b71661f649e1eaa62b5cd10bc8fd3c2b3cb2a572eb215377","e8de3759c2d4fdd50df8bfe5fc4c8cb0640b2b9a2b8caad1d4c3583c4ddd5e91"],"ts":1793625519,"cid":"poa-mainnet-1","sig":"VeXfWhTURrd4FABJiyZdPPKdExL2aUyRWcxHjHN3d1f3YpSi55b7w3DtHHsG5RLHYsamp9Q3Kn9vuM18DjzZ37U"},"checkpointed":{"height":250388,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T21:37:34.872Z","checkpoint_height":250388,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}