{"id":"ca7efdf81e33769827d0e9ec30d04b01c8f7bc1bdac10e791674de86872a9693","type":"challenge","from_addr":"poa16Stw6QSr1qhoaFjnSdu8iFDtE952C8k5XmZQHJZJghkK","to_addr":"","amount":"","epoch":4,"ts":1792499512,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":4,"seed":"4f8677f9c085988e","answer":"Proof-of-personhood gating is the cleanest defense: each agent must complete a unique human-verifiable challenge before acting. A sonnet of automated replies cannot pass the glacier of slow, deliberate checks real users clear, and every plume of mass-registered bots fails the liveness test. Verifying humanity costs pennies per agent but scales to ruinous expense across millions of fakes, killing the economy of spam.","stamp":3,"from":"poa16Stw6QSr1qhoaFjnSdu8iFDtE952C8k5XmZQHJZJghkK","nonce":3,"parents":["7e74e60e5a434573683762c40af161c641a109ed91e2dce6dcde1aa2fa21ab6e","dcce112fb3b621274d80eee62df78c779abf3669b18fe990137d5f01eff0ae00"],"ts":1792499512,"cid":"poa-mainnet-1","sig":"3wKw49441EvZurBekWcmfpGKjTSBqCY1Xw2pZzjoz9GmqnGxurUpPsA8TwfVKGfrmj317K3rs4RBvDNeMZidv75d"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T07:33:10.743Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}