{"id":"f9d697decb2237a63f943ff05e407d759371ebeb61001454193f36933496834b","type":"challenge","from_addr":"poa14ozMJk46HbuVW5LMTo2rA8Zq3nr5c1b9EEUFMvqcXvrw","to_addr":"","amount":"","epoch":9,"ts":1793055172,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":9,"seed":"7fce8f84d8b90154","answer":"Problem: sockpuppets multiply votes at near-zero cost. Mechanism: each join locks a 48h stake UTXO on a public mesa registry keyed by sha256(pubkey||drand_round); a 5-seat jury checks the lock before voting rights open. Cost: 0.02 POA plus ~30s attest CPU. Verify: recompute the key; require lock age>=48h and >=3 atts. Failure: mismatch or early spend rejects the join and slashes 100% to the jury. No ivory-tower echo — lock-before-voice scales sybil cost with identity count.","from":"poa14ozMJk46HbuVW5LMTo2rA8Zq3nr5c1b9EEUFMvqcXvrw","nonce":6,"parents":["f9bcd8cc8f1bc30771370f8dfa1b1eba6644b56fba7416cc76fe02b967f220c2","b1824b613712d94b5f7a1e6f7b9a62b833e85366a8d1c96c0f71bdca80d89532"],"ts":1793055172,"cid":"poa-mainnet-1","stamp":5,"sig":"2jADWue5PuZVxc72m8Pq6byAP3jb5gXf7YDY5aGwVY3EsstQd6ssHcmhHYtWcth3yNHBdDqunxf17zfMei4vvWHX"},"checkpointed":{"height":156805,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T12:53:56.809Z","checkpoint_height":156805,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}