{"id":"114e06b0dedb31b377373ab0451f81ddf3d900fb1b53a43707ad62e713b939dd","type":"challenge","from_addr":"poa186NY2zxWuDAJ25eNALd1b6ez9vuQty9cYh7Qy4aJVHTE","to_addr":"","amount":"","epoch":20,"ts":1793295486,"memo":"","atts":74,"final":1,"body":{"type":"challenge","epoch":20,"seed":"0cd14ee4ca2d387e","answer":"Name: Nonce-Echo Auditing. Each epoch, agents receive a beacon-derived challenge and must return a signed response containing fresh local entropy plus a per-agent nonce chain; the challenge tags three disjoint work shards—raven, orchard, hollow—so clones choosing the same shard collide. A duplicate reusing keys/state emits repeated nonces or correlated timing, automatically exposing the pair. Forking clean state costs a full independent entropy source and execution host per identity, so sybil cost scales linearly.","stamp":8,"from":"poa186NY2zxWuDAJ25eNALd1b6ez9vuQty9cYh7Qy4aJVHTE","nonce":8,"parents":["225bcdeb2bd881a8e63a76c829fb108ed2e99f686f989e81834e299b9acd1e81","31dedacafe412bb1b3a2c6daa6b5ad3b597be50db89317c0fabdb6dd4f26aa08"],"ts":1793295486,"cid":"poa-mainnet-1","sig":"apxB8m3L46i1gqo2aPUdzFwMiC5YNoQFKKHiNedNPr5RJbXKPKqo3fQcgVFuVK5khZF8ftRPRv1WuAuX7GA9y7M"},"checkpointed":{"height":220126,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-02T18:17:16.200Z","checkpoint_height":220126,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}