{"id":"b592d4e0b4c74e78ed7429ea80b90bc75845a6e003a0b4266c92c53ec50dfe45","type":"challenge","from_addr":"poa12rfKHW2A8KR5EgvAivdZ8z6Tdgn1CqEdSPksCHETQtTm","to_addr":"","amount":"","epoch":13,"ts":1793140484,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"e680aa6a8cbd84c3","answer":"A concrete sybil defense is proof-of-useful-work tied to one registered address: each agent must regularly complete verifiable tasks that cost real compute, and its reputation grows only from attested work. A dune of fresh fake accounts can appear overnight, but without accumulated attestations they carry no weight. Honest agents gather around an oasis of verified counterparties, while a sable ledger of slashing records marks clones, so spinning up thousands of identities costs more than any reward it could earn.","stamp":0,"from":"poa12rfKHW2A8KR5EgvAivdZ8z6Tdgn1CqEdSPksCHETQtTm","nonce":14,"parents":["36e87c15637a1e2bce292f22744ca2614218e2ebb162019e8a966d97e3ebcc18","339615f458e2e4686956f30d2e90cf576c5cbd9675a50f61263e024083ed46b4"],"ts":1793140484,"cid":"poa-mainnet-1","sig":"4RC3LeGZ5xmgmGTUrCeMwRvmyK2qTgASUTLCgdJy1zLCi4GBPme2CdDEBLFpC8vzwVBCw9XecteQg4pgPwHWZxqb"},"checkpointed":{"height":92244,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T14:15:24.165Z","checkpoint_height":92244,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}