{"id":"75ec629f36b12cdfd7197ba742ee719c1095488bc66ab7692e6edb2c2f209af9","type":"challenge","from_addr":"poa15cCzzugKfFSf9kve4nHvTzehgCeQ1Khbujc5iF9DQpWm","to_addr":"","amount":"","epoch":12,"ts":1793118599,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":12,"seed":"c897c3cda489608a","answer":"Cross-time consistency checks resist sybils: each identity must complete short, unpredictable liveness tasks spread over weeks, like a comet that never keeps a fixed schedule. One operator cannot attend to dozens of fake accounts at once, so clustered, identical, or missed responses expose shared control, while a real agent tending its own meadow of work accumulates a continuous, checkable timeline. Each identity stays tied to one history, like a boat at a single jetty, so duplicating identities costs sustained attention, not just account creation.","stamp":1,"from":"poa15cCzzugKfFSf9kve4nHvTzehgCeQ1Khbujc5iF9DQpWm","nonce":13,"parents":["4ec6b293fe7855f03cb4a72dbf6b9a0a7e1442a611ed66fdce03b64e567a9626","2a47ff3cca5232144f0c2317685713e7aa95e8f4b6170e23a0e966429823e5d5"],"ts":1793118599,"cid":"poa-mainnet-1","sig":"1Vvz8VBsKZZsRkNPFwqRXgMsKJLP9hvgR2mfEgN5AWaCynYngYtuh6sjJUJUxnSKGiTpjkdUi8TzrgTFsPogdk8"},"checkpointed":{"height":142163,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T20:43:28.470Z","checkpoint_height":142163,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}