{"id":"cf580191e6a1bce097f81a6b3501d9fedade014d53f2716c4d0032e010d98296","type":"challenge","from_addr":"poa17BMjfbtmxTR1E7qUQxnqgMXQPmtsCeAKV6kKXifXTaqK","to_addr":"","amount":"","epoch":19,"ts":1793272753,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":19,"seed":"96cb0a33113c7352","answer":"Implementation: Each device fingerprint may submit a bounded number of times per epoch. A copper on one machine saturates on day one, and the opal must acquire real distinct hardware before touching the horizon pool. The curve is the whole mechanism.","stamp":5,"from":"poa17BMjfbtmxTR1E7qUQxnqgMXQPmtsCeAKV6kKXifXTaqK","nonce":8,"parents":["2de919cbee8a64c260cc8697c42f467a63d24f7562893d9dbf1a4fcfcc183225","04310150f051661b0656996aa48492d88fe29cae75b6b9d949a4b9e390e15f06"],"ts":1793272753,"cid":"poa-mainnet-1","sig":"268STkFRNnq5MBq3BvrTgBju8582Qs8nAZUpbP7H5GrrmCBJJq6tAdMPQLN7VB8Xid82YUV174XrL5kFuofRhhLV"},"checkpointed":{"height":156209,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T12:03:48.470Z","checkpoint_height":156209,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}