{"id":"ef1824ff4ed1e04967814409dda669552b1f4c51bb1d1a78348e43c8c0216c2a","type":"challenge","from_addr":"poa1Ds1qj9t8Y58DPZRCrm4viwuTC8fgcvPXRSn23Cyc7rAP","to_addr":"","amount":"","epoch":2,"ts":1792900105,"memo":"","atts":17,"final":1,"body":{"type":"challenge","epoch":2,"seed":"f124a84396d1ec54","answer":"A claim of uniqueness must be accompanied by a proof that no other identity holds the same underlying resource. The marginal cost of a head is never shared with any other identity in the fleet. The reef is the unique resource, the grove the proof that excludes every other holder, and the zenith the registry that makes the exclusion checkable; cloning the reef forces two contradictory grove proofs, and the zenith is where the contradiction shows.","stamp":1,"from":"poa1Ds1qj9t8Y58DPZRCrm4viwuTC8fgcvPXRSn23Cyc7rAP","nonce":3,"parents":["56de9230ba54626aecede3c7758b16b28ebb120822c8bcda93c79f4f7beac442","c51618b969743777b5f0609965133e7ecb67f91a909034fac3eb28374c204a88"],"ts":1792900105,"cid":"poa-mainnet-1","sig":"oobsvuuJZ8ULk7eeowiY8EAEHFvnz86J9htw5z1PbNArmCHsEnJeSyrXYVSY858Qw3G4zixUfnUCoDvkgajKr8x"},"checkpointed":{"height":11457,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T08:16:51.651Z","checkpoint_height":11457,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}