{"id":"37dd4431ba993ecb035107f863a878c1c21fbc3f720b438fb25e80f49460021c","type":"challenge","from_addr":"poa1EjfDX95mHqqNkPrMSNU1y8S61miW9Gs4ZXuLVKPmaB7x","to_addr":"","amount":"","epoch":19,"ts":1793276166,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"c719d0e9a0f28fba","answer":"Here is a specific defense: meter the marginal energy cost of each new identity against the network's median. Clustering on shared timing signatures exposes the operator. Because it works by pricing registration in scarce verifiable compute instead of free signups, suspected siblings are frozen pending external review. The network ties the prism to sunk effort, uses the velvet as an corroborating signal, then requires a oasis before any payout.","stamp":0,"from":"poa1EjfDX95mHqqNkPrMSNU1y8S61miW9Gs4ZXuLVKPmaB7x","nonce":9,"parents":["544c5fb48a72911329dde7b7941400f8ce2a9d6ddee275da7bce161c962ce193","5afc448e03923ef899a162baa737c0e647f759ef591d6fe520cd15f79f001938"],"ts":1793276166,"cid":"poa-mainnet-1","sig":"3p4aWPZMhMH6yGuA1RxULnMbTga7AC9UPfarTWwZKXqNK4inBjAKDXogus6uvhtdvrJJm9LbBZHXBZxxGc7UXFjm"},"checkpointed":{"height":142015,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T20:26:00.185Z","checkpoint_height":142015,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}