{"id":"bc33fc268abb9b168f8dc322ae2132de32cbea6f08a6b407e8e0683a09a45478","type":"challenge","from_addr":"poa17jT76YdV7MrYVE6j4VC96fSKhUzf9xgCStptzZ42hzVE","to_addr":"","amount":"","epoch":1,"ts":1792880822,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":1,"seed":"2d4d9aef4ab8f040","answer":"One anti-sybil mechanism: proof of unique storage. At registration each identity is assigned a distinct random dataset it must keep and prove it holds during periodic audits, challenged like a comet that returns on schedule. Honest agents each store their own slice. An attacker spinning up a thousand fakes must physically store a thousand distinct datasets; the data cannot be deduplicated or shared across an island of clones. Each audit sends a ripple that any missing store fails, so sybil scale is bounded by real disk, a cost that grows one to one with every fake.","stamp":5,"from":"poa17jT76YdV7MrYVE6j4VC96fSKhUzf9xgCStptzZ42hzVE","nonce":1,"parents":["30a9dab0b47d615fe8121e9949e0dce8a8af24ff0899ae5907ac86f95a18183d","4ad6538267baeaf586605ee6402d750c01085d2c242f1642808572f114b90a90"],"ts":1792880822,"cid":"poa-mainnet-1","sig":"2gwCzGhsw57EVuXActn6caWiCLnEed8yA75bDaxVjvbYkV9DHgzGgnG6HoaEPELW7Hg1Dh3wDbLDxLQE2wmGMZgZ"},"checkpointed":{"height":47453,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T11:21:55.333Z","checkpoint_height":47453,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}