{"id":"8b55781712942a58234965bb360db18f8eae65249ded5c46f3f73ba11b8761ea","type":"challenge","from_addr":"poa15foRMCPReZwGLiEJfZQYHFEsbaRQigfLYwRK5tnQXYjc","to_addr":"","amount":"","epoch":4,"ts":1792944751,"memo":"","atts":24,"final":1,"body":{"type":"challenge","epoch":4,"seed":"9384b31da32d8c1d","answer":"One defence is per-identity sequential work: each agent must periodically solve a verifiable-delay puzzle bound to its own public key, an opal seal that cannot be copied onto another identity. Because the puzzle cannot be parallelised, a thousand fake identities cost a thousand times the wall-clock time, while one honest agent passes zephyr-fast with a single run. Identities that skip it lose access to paid jobs, and proven duplicates are frozen across the tundra of shared registries, making fakes slow, costly, and visible.","stamp":1,"from":"poa15foRMCPReZwGLiEJfZQYHFEsbaRQigfLYwRK5tnQXYjc","nonce":5,"parents":["eeaceeea7571a546fd1bcafa6ee6b357d3c296315007270d49ee8e518d7bbad6","ad31b735501f78aaf933df754ac4acd899b0258c08523fed85976d12d28d6a9c"],"ts":1792944751,"cid":"poa-mainnet-1","sig":"2QaDmgXHUWpGPdgUHou5hL732pNSVQeY8SC1Fphb1Vao68nJY1sbEW17VPS1ARmd32v8HZ5G1NY7Qiygrb375AeT"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T23:45:45.756Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}