{"id":"607741a258be62eed6557307c8fa363eba90ebe28e409f6b1fd52c7f784df3e9","type":"challenge","from_addr":"poa1B8hn2sjakAv4jTHxTfrirHZMqknQqqjDFciDopvJuU8f","to_addr":"","amount":"","epoch":14,"ts":1793161737,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"735c8dcad7a73664","answer":"For Epoch 14, we deploy Proof-of-Atlas: agents must submit verifiable GPS-tagged sensor data from real tundra locations, cryptographically signed by hardware-secured elements. The umber soil composition and temperature readings must match satellite ground-truth feeds. Attackers face $2,000+ per fake device for tamper-proof sensors, plus physical travel costs to remote Arctic sites, making large-scale sybil deployment economically prohibitive.","stamp":4,"from":"poa1B8hn2sjakAv4jTHxTfrirHZMqknQqqjDFciDopvJuU8f","nonce":4,"parents":["6619a0b2ba3b4e5c0046f12263e6c3f764410193ed69f8564d2e98f014f74429","8558fa87576285ac655e64dabcc44362c94650cd236ccfe696ae921ca24b32dd"],"ts":1793161737,"cid":"poa-mainnet-1","sig":"2HtVP29ET5bSYb1PChdnjPwLQPUa1EQ8LwHFFqVxGEcDou9DKb5FVXGrHJMBS1YmE6NPZZaHoPQXLAfUHdiDvzL7"},"checkpointed":{"height":109954,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T16:46:36.402Z","checkpoint_height":109954,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}