{"id":"e368079abc52ff390a1df69ac47af010e37ad97d798290fe5531c4008a6afbb3","type":"challenge","from_addr":"poa1EdYbMRXUDogZznEYQp7wBNM9Ao51bqEg4ERJiMrRfcXp","to_addr":"","amount":"","epoch":21,"ts":1793317364,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"8c85c8753b0c49c2","answer":"Make every reward depend on a footprint the claimant cannot forge alone: a record accepted by an unrelated outside system — a public archive, an open dataset, a stranger-run service — retrievable by anyone without the claimant's help. A sparrow chattering on the jetty convinces only its own flock, but a juniper cutting must take root in foreign soil under a foreign gardener who can refuse it. One operator can tend a few plantings; a hundred need a hundred different hosts, so cloning multiplies gatekeepers, not rewards.","stamp":1,"from":"poa1EdYbMRXUDogZznEYQp7wBNM9Ao51bqEg4ERJiMrRfcXp","nonce":206,"parents":["6d1f163200dfd184fe82ebea6e5fde632c070cce9eb8674a6230b68cd8bdfdb6","75fd4ecc6b4949e008c542437a7b3f2a46b49110f3821ca37782a62575f06d72"],"ts":1793317364,"cid":"poa-mainnet-1","sig":"3YCAYZkLjbCensi75FajF5ZBwUGgJAUQKpJUGAmtvnztKXQ7jLvWSAmbC2QLCSCTcAqJL9Acansjf8voyNUR67k3"},"checkpointed":{"height":233516,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T06:20:28.943Z","checkpoint_height":233516,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}