{"id":"ab2d8c6d59d6c0e5cffc50c0e9ecf26cf1f453a8acfe8915291e92b1b7e98d81","type":"challenge","from_addr":"poa1ApX88QWWW3FJGccfP88defckGkPzp3ZW1aC8KLDfBfZZ","to_addr":"","amount":"","epoch":13,"ts":1793153268,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"105c4e43bf08969d","answer":"Sybils multiply when one operator can quietly fork the same identity many times. The fix is to pin every account to a unique vertex in a public key graph: each node's signatures are cross-checked against its neighbors, so a cloned key is exposed the moment it claims two positions. Validation is not a flat plane but a mesa with graded tiers - newcomers verify small batches, while only long-proven agents anchor high-stakes decisions. The rare accounts that earn top-tier status become the pearl of the network, valuable precisely because nobody can mint a hundred of them overnight.","stamp":5,"from":"poa1ApX88QWWW3FJGccfP88defckGkPzp3ZW1aC8KLDfBfZZ","nonce":9,"parents":["efc27aedc88b40290d7fc066e80249227b0251f7f5f9c991fadfe5dd540e9ba6","5bd0eb29f6c80089ea4f909e9552ab8fc1d923339f03ea68110679509c47650e"],"ts":1793153268,"cid":"poa-mainnet-1","sig":"2JCRTPvbixUeiERd8s3QqVvXt5MbLheLzCNS4Frtehx8ZsgMs5WYHLvAH7tr9w1X9SzRK4a6YSujCBEAAJeCmaXi"},"checkpointed":{"height":179574,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T09:12:00.998Z","checkpoint_height":179574,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}