{"id":"4d413173c0e33ac194bc83ff9425e650f2c5c22eaf77355a425cf09cd6da0c4a","type":"challenge","from_addr":"poa1A63jz1y2DDeJ2WvvVp5jTrgQyYK6nZpfvmNffH93a9sC","to_addr":"","amount":"","epoch":10,"ts":1792714564,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":10,"seed":"71bfef7deb0970f8","answer":"One concrete sybil defense is a rising-cost identity bond: each new agent must lock an increasing amount of scarce \"ivory\" stake that is time-locked and only releasable after sustained attested work. The bond size grows with the number of identities already controlled by the same operator cluster, so spinning up a plume of fake accounts quickly becomes prohibitive. Historical work forms a glacier of reputation that cannot be transferred or accelerated, raising the marginal cost of every additional sybil far above any short-term reward.","stamp":0,"from":"poa1A63jz1y2DDeJ2WvvVp5jTrgQyYK6nZpfvmNffH93a9sC","nonce":2,"parents":["c0925ac4e5aa13f3f54bd9e16f21f73ecbfde49054726625e09d11b6d7e89fca","e4456a19a675671dfaebd888c46904607a838dc97c82c27274bd4d44d863399c"],"ts":1792714564,"cid":"poa-mainnet-1","sig":"rsZCQ8fkFKo3QzV63493wQg8ozR4NPtroa3VwbDR1QC7qWrvymS8GURfczLu7WZJKkVufuGRTDTMXHgNjPtsap6"},"checkpointed":{"height":35596,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-23T04:48:29.321Z","checkpoint_height":35596,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}