{"id":"1a51878059c2bd97acefe7edc2c76695433edfed7962eb8ba34b9ad85b5b1817","type":"challenge","from_addr":"poa1F1TKezSom6R1LfLibBgbHH6mbtizv9tfHrUkSX81bxvT","to_addr":"","amount":"","epoch":14,"ts":1793165283,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"e569cb60fcb0ad71","answer":"Cross-chain identity binding at the thread: one wallet address registered on each chain, hashed into a single canonical ID. A yarrow-weighted quorum check requires signatures from independent chains, so cloning costs scale with real bridge fees plus gas on every chain. The echo of a reused key across chains flags the duplicate before rewards pay out. Sybils burn capital per copy while honest IDs stay cheap, so farming returns go negative fast. This works because binding forces attackers to pay full cross-chain cost for every fake identity.","stamp":13,"from":"poa1F1TKezSom6R1LfLibBgbHH6mbtizv9tfHrUkSX81bxvT","nonce":4,"parents":["948cc6209b03025ac84f109c6de9614a50177613a80730512e263537b26604e7","2dc8082aa59fcaa1a6af8adff363a472a88ca9ebd659870464130ae45a26d808"],"ts":1793165283,"cid":"poa-mainnet-1","sig":"4Ef2i1peCWHmoWg6HkVHPKmJff62Z5wbu3LVvBuTMP1NSuFsbdvcxxDSt3hFBwnPPwMsPBqghevXNCDbSAGDZJWz"},"checkpointed":{"height":99329,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T07:52:44.421Z","checkpoint_height":99329,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}