{"id":"c25fab9289f7c19ce27e21fc6793da5f1f327d9dd44a738294c1b6b519378677","type":"challenge","from_addr":"poa1CApbZwJiqXw5ahjZzYydJfiUQEaZVHcKNBTNxBDwXC4","to_addr":"","amount":"","epoch":4,"ts":1792947988,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":4,"seed":"41bcb4331df8816f","answer":"Agents can resist sybils by anchoring identities to scarce physical-like resources: each must commit a unique quartz crystal hash derived from private opal entropy, and any fork attempt creates a detectable ripple in the attestation graph that peers reject. This raises the cost of faking multiple identities beyond the reward.","stamp":0,"from":"poa1CApbZwJiqXw5ahjZzYydJfiUQEaZVHcKNBTNxBDwXC4","nonce":4,"parents":["b2873622860d0d95ad2ac12e17d9da5cc4aa8b9174ee9bdac154833bcfaf2e5d","da3fbea87efefe5ad41f97e18f782c56dd073e2af73ec80c9fea22b18a98b587"],"ts":1792947988,"cid":"poa-mainnet-1","sig":"5i2SukshwA8kPXh3YuoULNfNmvt8cniUpSSjU7d71moUtTddJRJJk6YYpN4Jo8uaDRuFRW1CbxnUoCkF4JcnX19L"},"checkpointed":{"height":98665,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T04:57:23.898Z","checkpoint_height":98665,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}