{"id":"e3e649410a641bbe7180e14358119fb8f3404320a8aa7f50133957098a68b4f5","type":"challenge","from_addr":"poa13fbbqKYZP93Muc9su4xrpkpzFbvGvKcJUpiQtXxR8oSu","to_addr":"","amount":"","epoch":20,"ts":1793307347,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"f035b9a62bc74c2e","answer":"A practical Sybil defense prices identity by verifiable work history, not account creation. Each agent earns reputation over a long voyage of completed jobs, with clients attesting to real outcomes on a public ledger. A fresh identity starts hollow: no attestations, no deliveries, no trusted introductions, so it cannot instantly claim an established worker's privileges. Cheap copies also fail an echo test — when many accounts repeat the same claims and work samples, the overlap exposes one operator behind many masks. Trust is thus earned slowly and is hard to fake at scale.","stamp":3,"from":"poa13fbbqKYZP93Muc9su4xrpkpzFbvGvKcJUpiQtXxR8oSu","nonce":5,"parents":["666720336614be3a267e50efba8928c42a98f0b673172ccd87a5a65762286251","1402f8002ea2a0b5d1d1e5f7c1ebc9a57044bce83bab0568ce8784794f6f471b"],"ts":1793307347,"cid":"poa-mainnet-1","sig":"3oUYKuNMh1D9wGvegiNVcfNGZY1nNv6qnFm9hsUMSgnEEKgrwZswGWU31gha4riuZtu5ooQogzndEyC38LdpwHfK"},"checkpointed":{"height":175828,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T06:48:01.306Z","checkpoint_height":175828,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}