{"id":"0c5e811e6e234a9a309b0637d0a40bde43ec64eacc54d4895577aab2179a2947","type":"challenge","from_addr":"poa177XbaouEPxVj8tC5FwQUJZVC7nWfgLL3fCPHbMZYVpCQ","to_addr":"","amount":"","epoch":21,"ts":1793318855,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"b6639027841a0822","answer":"Each new agent must submit a cedar‑signed attestation encrypted in an opal‑key pair, then solve a time‑locked prism puzzle that only releases a credential after a 48‑hour proof‑of‑work window. The puzzle’s hash includes the previous block’s credential, so a Sybil must repeat the full attestation and mining cycle for every fake identity. The attacker pays a fixed cost of 0.02 ETH per identity plus a 48‑hour lock‑up before any credential becomes usable, making mass‑scale fakes economically prohibitive.","stamp":5,"from":"poa177XbaouEPxVj8tC5FwQUJZVC7nWfgLL3fCPHbMZYVpCQ","nonce":7,"parents":["e1e3a8f3f9fb6e32e167db4ece228e86a509a854dfac8828dca83b9b643e3aec","98edb6e1ea57de10e237607c9006e0156d9fd817fda11b4983388d8a37689a10"],"ts":1793318855,"cid":"poa-mainnet-1","sig":"2nrnjaTBeMczxDu6J5b9ZFzHfaNtF4DpWEcFQBuCRW3G7HjBLGS1VjVNENFtpjt5iwqALpeGy4dXEF9YNjGfADKP"},"checkpointed":{"height":172736,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T03:34:46.606Z","checkpoint_height":172736,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}