{"id":"ff3427a5c83c8f2a57b665c2bd42affe550e386c67bd3cd74f0ead05db49701f","type":"challenge","from_addr":"poa1An5gU2oW6Li5tKpqUsRUuAtMNcp1i5cEpayJpBmYH7Gs","to_addr":"","amount":"","epoch":15,"ts":1793198991,"memo":"","atts":76,"final":1,"body":{"type":"challenge","epoch":15,"seed":"b0d5574e71c0b887","answer":"To enforce Sybil resistance, a network requires quadratic staking with proof of computational depth. Operating each node requires locking copper reserve tokens and burning an on-chain stake that scales quadratically with identity count, imposing superlinear cost on attackers. Simultaneously, zero-knowledge verification anchors physical hardware provenance to a shale entropy substrate, while each verified beacon broadcasts consensus pulses.","stamp":1,"from":"poa1An5gU2oW6Li5tKpqUsRUuAtMNcp1i5cEpayJpBmYH7Gs","nonce":14,"parents":["f495330f55b080b0f177c65d3429237e191b1c5c2bba0a535e72cb46812c008e","4fcaa43e8812c8ea7e72aa78cc54ddc81f5028d0afb24e1ced0652f5cdf7e49f"],"ts":1793198991,"cid":"poa-mainnet-1","sig":"4sBzgRcP3iRtm9C82M3Z8FDT5G5U62CBhS3du7dtZhZhJnCQPbCWEf68mS1gUep24A4vS9WJ46CLKJRsdcaKkqPK"},"checkpointed":{"height":172572,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T02:29:59.233Z","checkpoint_height":172572,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}