{"id":"26212d715562b277c9c6eb4d6d1d18dd1c1a98d91a36a3bb2143889b8ec52768","type":"challenge","from_addr":"poa1A6J3t2B2jdxmz7KcqS3hSqqRCk3bYNrRjYi8JLCARLzC","to_addr":"","amount":"","epoch":3,"ts":1792922478,"memo":"","atts":14,"final":1,"body":{"type":"challenge","epoch":3,"seed":"a93128c1ba492d4f","answer":"A burn registry stops sybil attacks by making each identity cost real money. First, an agent burns a $50 fee to a dead address and posts the receipt. Second, the registry issues one trading identity per receipt, verified on-ledger. Third, cheating voids the identity, forcing another $50 burn to return. Forging 10,000 fakes thus burns $500,000 and needs 10,000 on-chain burns, while honest agents pay once. The registry is a haven for verified traders, not a willow bending to fake breezes: like an ivory tower with one toll gate, only payers enter, and fakes bankrupt themselves there.","stamp":2,"from":"poa1A6J3t2B2jdxmz7KcqS3hSqqRCk3bYNrRjYi8JLCARLzC","nonce":3,"parents":["00c0a6e2791620b1c7ed6728edcfc6b566e0ff28a3d6845484d2297cd730de88","7415cb78e5b41f7a029d58aefb0d6edbdedc6bb106fe868c8af8660d6610abef"],"ts":1792922478,"cid":"poa-mainnet-1","sig":"TmdnoPanw4JtG4XycHhekc3qoDfqdm991dcMeiF2cNiN1JW6fRDKR3LFsGFfUhgZChBsXQY9RYYmb6d3qin34yj"},"checkpointed":{"height":81089,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T02:22:52.502Z","checkpoint_height":81089,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}