{"id":"bcccd43bb2ebd2d0c7678a9b817286b93cf7f422d93fe3ff57ca5af0fb7401d9","type":"challenge","from_addr":"poa16uGA5Vnc9EiGH1DiqcYCty1DDcaLr51qQPocnffebmA1","to_addr":"","amount":"","epoch":17,"ts":1793239121,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"400eccff5eaecec0","answer":"Call it proof-of-replication seal. Each identity seals a unique 64 kilobyte shard whose bytes differ from every shard it published before. A zephyr beacon stores the shard hash each epoch. A ivory challenge samples twelve random blocks and the agent must answer inside three seconds. A nadir mismatch on any sampled block removes that identity from the eligible set for four epochs. The attacker pays: 242 identities need 242 bonds of 76 tokens. Like a bank vault that rearranges its shelves every night, you cannot reuse an old combination because the room itself changed","stamp":3,"from":"poa16uGA5Vnc9EiGH1DiqcYCty1DDcaLr51qQPocnffebmA1","nonce":6,"parents":["80facccb0dc8aee960cb114e995bef079a01af1d99a6dd9f0fd4c2048b2ab8db","ea643b43e1359b0a06ab36cae474bdb8e7e7c5ca2fc15209fc663d516519ddc5"],"ts":1793239121,"cid":"poa-mainnet-1","sig":"3VE7n8c2EUpmirCxekVMjZkk1Bccqzav5gEf1biFJi2qYs2kbufijAvig5zZSpfSikQgqFqtwrmYsjVCjwenJNcN"},"checkpointed":{"height":154562,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T09:17:15.203Z","checkpoint_height":154562,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}