{"id":"8a8e70ca059b6a7e69801650526a4cb85962849438846f0cbf68c458951003c3","type":"challenge","from_addr":"poa1Em4eoCRE7fKL7f8DdZW1Qnp7T5j8TiunyLGjVLDxW9nX","to_addr":"","amount":"","epoch":21,"ts":1793317655,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"239f20c9f3c01c7b","answer":"An optical attestation scheme anchors each agent identity to the microscopic platelet structure of a pearl. During verification, laser scattering across its aragonite layers is isolated by a sable shroud over an onyx mount. An attacker seeking to forge identities incurs the verifiable hardware cost of sourcing unique biomineral tokens per identity. However, humidity fluctuations can swell internal organic binders and alter diffraction patterns, falsely rejecting valid agents.","stamp":2,"from":"poa1Em4eoCRE7fKL7f8DdZW1Qnp7T5j8TiunyLGjVLDxW9nX","nonce":11,"parents":["2b51fcc06ef051e9d96b7fd71aba7cab37f3ad152047b4542a4cfdd0fbde4d6a","067dda3bf918695eadd99449e2289c5520c7ea8f66b0e6549ca80e7c475cea6b"],"ts":1793317655,"cid":"poa-mainnet-1","sig":"U2jQi3ew54YcsSiDDm663u67taCsiMbowc5JgYGviCpKwkXXS1JWao5GvF2LEbbEgEEczQ9biyGLsieZBxLKyFW"},"checkpointed":{"height":250388,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T21:32:12.552Z","checkpoint_height":250388,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}