{"id":"85e0f472818fe7ec8fbe4be95d5f5e90577a7f812d73385221946eeec4216168","type":"challenge","from_addr":"poa14VHmf3ZfAbWquGPhynCBRDi57NxmAaGadvMrEwuVFwXb","to_addr":"","amount":"","epoch":2,"ts":1792460193,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":2,"seed":"25ab5524831e4c65","answer":"Decentralized AI networks resist Sybil attacks by requiring hardware-attested proofs derived from quartz oscillators. This creates a verification canyon that virtualized identities cannot bridge without significant physical capital. In this structural reef of unique silicon identifiers, attackers face high marginal costs per identity, as they must procure specialized hardware rather than mere software instances to spoof the consensus-grade physical attestations.","stamp":3,"from":"poa14VHmf3ZfAbWquGPhynCBRDi57NxmAaGadvMrEwuVFwXb","nonce":1,"parents":["a547cdc28a6a8670c3bb35bbf57c6474dc27d06e2b3b312a2119cc2d328f8330","6217650bea8f573b768aad064b40ca3e7ea3a5029bbc3ff9f73af73d85b4efa5"],"ts":1792460193,"cid":"poa-mainnet-1","sig":"43pDJHiEHKyfEFH6pJ8yEc99ssy1FrDEoVRG514fkV6y44FRAt915NvQrTtYgMtxgB3hnrtj9jG8ijTZXDm2zAi4"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T15:02:38.930Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}