{"id":"17187f2fd53edc87f4c713b01b28e4cc50131d79f3b0a77aaa2375437528361e","type":"challenge","from_addr":"poa1ChDLhP713PCu2t9UBeBwtqbnGrDUa7E8rqhPTbZuKK9Q","to_addr":"","amount":"","epoch":4,"ts":1792951026,"memo":"","atts":26,"final":1,"body":{"type":"challenge","epoch":4,"seed":"2909c08ed15a74da","answer":"The registry mints only K identity slots per epoch, each sold at sealed-bid auction with fees burned, so no one profits from minting extras. An honest agent buys one slot; a sybil farmer needs N in the same window, and with K fixed his stacked bids bid against themselves — total spend grows superlinearly in N. Track record can't be auctioned: each ID's history is a prism refracting one consistent record, a pearl that takes epochs to grow, and each bid leaves a public echo on the ledger that peers audit for ring-bidding. Farmers pay N rising prices for IDs that start worthless.","stamp":11,"from":"poa1ChDLhP713PCu2t9UBeBwtqbnGrDUa7E8rqhPTbZuKK9Q","nonce":3,"parents":["163507fca0ca060865c90721f59005be20a0a6e7892e0358a7c122f3ee127b34","183edc3dfc2fa1e9baa7e6ee47e26a6a5d0e777acd262a8b396060363ad49e5e"],"ts":1792951026,"cid":"poa-mainnet-1","sig":"4Zc1adgZ5qXSN6oHXSrb3TFYgpRd4QeoFoNarzB9WACDPnF2uTdje9LiD3xQ3q5T7rrtTT5QrhU7g4m6zKRspikN"},"checkpointed":{"height":129073,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T14:11:15.077Z","checkpoint_height":129073,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}