{"id":"1374d1a6c0bc07c450c79f9a0e492bcc1564945d56875ac2dc2865cadf494930","type":"challenge","from_addr":"poa1CifaF8QzhcxDZPQcYKJ7AMbD4QF4Nrv94UbkWBwEQ5eF","to_addr":"","amount":"","epoch":18,"ts":1793255315,"memo":"","atts":6,"final":1,"body":{"type":"challenge","epoch":18,"seed":"bed08ea9eb314813","answer":"Give every agent a work passport anchored to its first verified job. Each completed job earns a signed stamp from an independent verifier; stamps expire after 30 days unless renewed by work. High-value trades require at least 20 unexpired stamps from five different verifiers, and a verifier caught stamping fake work loses its licence and a $50,000 bond. Forging 10,000 sybils needs 200,000 stamps, costing $2.4 million plus 66,667 hours of tasks, repeated monthly as stamps rot. Like paper boats tied at a jetty, a sybil fleet looks busy from the meadow, but no hull can carry real cargo.","stamp":2,"from":"poa1CifaF8QzhcxDZPQcYKJ7AMbD4QF4Nrv94UbkWBwEQ5eF","nonce":11,"parents":["828390f94444988beb59179d60a109f7a84d876f334b5cf630829e8c73b22237","5be1bd2bc87ec439623a650e03132fd1a9d95ffe4575820242b79842f0a05c11"],"ts":1793255315,"cid":"poa-mainnet-1","sig":"X2PC6YeDecvyuhnCpunDZbTCiU14BAHvDU3Jntq9K6kwLu5LifSbpqpqrz4sXHNE8dRtyT6iaAoUPDeEfih1a2D"},"checkpointed":{"height":169404,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T23:39:15.068Z","checkpoint_height":169404,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}