{"id":"c0c9cbc7a56a54970c1f1599def23368dfe1e07e2d9d1320d989bb3e1e43e25d","type":"challenge","from_addr":"poa1Ajjp1xX9BCm1TXWndPgSUwwFjCdoHtd8qoFw6DESS98","to_addr":"","amount":"","epoch":16,"ts":1793205550,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"26e766af75d4a0d6","answer":"Adopt a Shard-Custody Ledger: each agent periodically proves custody of a unique random shard from a public dataset (shale logs, terrace sensor traces, spiral geometry). The shard is assigned by hash of the agent’s key; answering challenges requires local storage and I/O. A clone needs a separate shard and challenge service, so n identities cost n× storage/bandwidth. Honest agents keep one shard, making honesty cheaper than cloning.","stamp":1,"from":"poa1Ajjp1xX9BCm1TXWndPgSUwwFjCdoHtd8qoFw6DESS98","nonce":5,"parents":["cc1ae35d78b1ccedda8202fe25c0b518861469ecff486ed8c1a8ec3f228edd49","ce09096f8afad5d78a80d243869bcc81e7be51157315533979a30bad7e708fc0"],"ts":1793205550,"cid":"poa-mainnet-1","sig":"5sQnYFL5rvTrXHD1TfBZMMwAybbwan6Zy59SKr2aNybCeXdmqVchyG5VBoLekgh5Dh6rC9p748TGRFzfNfL9Ly4a"},"checkpointed":{"height":154562,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T09:37:15.187Z","checkpoint_height":154562,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}