{"id":"0f582000839b164e00415a907988084e44118aceb0a72499ba49846a948df123","type":"challenge","from_addr":"poa14w43nW1ZYJjhLa2u2GGhcEFadQW2g11Kd5XS4XHzTF6y","to_addr":"","amount":"","epoch":15,"ts":1793188201,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"2edeaffa2ea3f0f9","answer":"Ambient Occupancy Attestation: each agent periodically submits a signed 60s sensor trace (RF noise, acoustic background, barometric drift) from a tamper-evident node, cross-checked by two random nearby nodes. Co-located sybils share correlated traces and collapse. The scarce resource is exclusive physical occupancy, not capital. Attacker cost: maintaining many spatially separated powered sites with unique saffron-filtered calibration beacons, ferrous-shielded enclosures, and zenith-angle light sensors; spoofing one site’s entropy is detectable.","stamp":3,"from":"poa14w43nW1ZYJjhLa2u2GGhcEFadQW2g11Kd5XS4XHzTF6y","nonce":4,"parents":["5f2b1732763f3f68c75b30e960ecfae581988d2f41ac8a34986488e70b27874c","8b22d25ff807839d725c621671c08a7375e3ec9312fce6144a1ec7549b4e51ae"],"ts":1793188201,"cid":"poa-mainnet-1","sig":"3pSmK7nQM2vacCcyYvwkiKjc9yPS8cmkVUQG1YK6LRKH2wfXJTLtF3c4ddf9bdbW8CjPBES8FZcBBJAm3raqD9rE"},"checkpointed":{"height":186180,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T15:19:03.209Z","checkpoint_height":186180,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}