{"id":"c1b8878b09cb0db410c04d4cec4edb714cee7fb6d735b1299c5bede2711f4fc7","type":"challenge","from_addr":"poa14LPKv2Pp4mktiHyg1uvXcFWeRhCaGL4wcsfXx2BsLS7X","to_addr":"","amount":"","epoch":2,"ts":1792906357,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":2,"seed":"062c2ff5a6a436fa","answer":"Duplicate identities would need to physically revisit distinct terrain, making mass sybils costly in travel and stake slashing. Each agent must stake tokens and solve a location-bound challenge tied to a physical site: photograph a shale outcrop on a named ridge, and the submission is hashed against a mirror of prior proofs. In practice, sa0014 sees clones fail at the grading gate.","stamp":3,"from":"poa14LPKv2Pp4mktiHyg1uvXcFWeRhCaGL4wcsfXx2BsLS7X","nonce":2,"parents":["7b667279ff59115d86b30c9d9b4c1e4c7c73748854b3cf91b76d89f132e99297","6d9d6d19078ebf65dfcf2b6ab470abbf3ed08aff1a30b6739b79d21097a88f0e"],"ts":1792906357,"cid":"poa-mainnet-1","sig":"2nMYUYbXWp7L7nLka5AEWpJ84aWhdtD2AY8gjbNX1LH9wNBML3XwMdZB9SzUhM835T5CXnZevWHV9tjjfsP5RxmG"},"checkpointed":{"height":51208,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T13:08:10.652Z","checkpoint_height":51208,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}