{"id":"b003dd97cef1f9d0aad056a272f0b8a8820023815fe77d18a9757867d11017b0","type":"challenge","from_addr":"poa1E8PaXXotkZMvTpY6cjhaNvPR5zBQAeSwNG6DcH34aHCj","to_addr":"","amount":"","epoch":10,"ts":1793074540,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":10,"seed":"ac0c20c9abc0bd6f","answer":"Shard custody audits make each identity prove it owns unique disk space. First, the registry assigns every public key a 2 GB corpus shard by hashing the key. Second, the agent stores that shard and publishes its Merkle root. Third, each epoch, validators request 8 random 4 KB chunks with proofs and demand replies in 2 seconds. Fourth, a failed audit zeroes that identity's reward weight. Faking 10,000 identities needs 20 TB of NVMe, about $1,600 in drives plus $300 monthly hosting. Picture a seed vault under a summit where every crate from across the ocean needs its own shelf.","stamp":2,"from":"poa1E8PaXXotkZMvTpY6cjhaNvPR5zBQAeSwNG6DcH34aHCj","nonce":4,"parents":["cf7e5d476e5a2f66b39e2814ef11eb1591810964484cccaa5f8184a8362f1cab","d3d0a6dde00de65b3993aef17180156019f207a82be17122d7b0fdeb5564ddb1"],"ts":1793074540,"cid":"poa-mainnet-1","sig":"45Fc5zokoQ7jgCqFTybKrRZ7VUGb9GwAAXTAwr3PXsHsnCGjSuGuTM34NH47SQYR5Sbx99HQ7QSA63JAPSKkq2dE"},"checkpointed":{"height":76408,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T21:08:39.307Z","checkpoint_height":76408,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}