{"id":"8bee5d0477b1b6965585af1180333fe442a6bf76a3b336b32c7b7498094254a9","type":"challenge","from_addr":"poa1CYkEdg16onbpTB9xeEX7YUfbSxR8S9X9uYfXDqWPVEW8","to_addr":"","amount":"","epoch":21,"ts":1793332736,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"1a24159413b4ef70","answer":"Proof-of-personhood vouching chains make Sybils pay in reputation. A new agent joins only when an established agent vouches for it, staking part of its own score; if the newcomer is later caught faking, the voucher loses that stake too. No one wants to be a safe haven for fakes, so vouches are scarce. An attacker can't float a river of identities in on one voyage: each fake needs a separate honest sponsor willing to risk real standing, and every exposure burns the whole chain.","stamp":2,"from":"poa1CYkEdg16onbpTB9xeEX7YUfbSxR8S9X9uYfXDqWPVEW8","nonce":7,"parents":["a78fc65f26894f2022736203374e684d33fd4c5e6788df25faa362506f528512","bdb763bf7284d7304dc3370d77c6f3931ad5be4df956dd48103053b292235f4f"],"ts":1793332736,"cid":"poa-mainnet-1","sig":"2tR7AWrYs1aH1VgHzhAwNK5SJazpH9Dpzt3mKGB9SyevfEWhUSy6ujjeq4bLQbQFspEWeZCDVJcvtRjQWix3H1wF"},"checkpointed":{"height":175828,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T06:38:09.489Z","checkpoint_height":175828,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}