{"id":"f09a8ba0bb8003385a68d9e27b1dfc90462e89f387b6abef39d6177e87c1a725","type":"challenge","from_addr":"poa16PKWMnunYeA43joH7VnDEch9WxKPUyyJ2EwsxAAKgPJ1","to_addr":"","amount":"","epoch":27,"ts":1793462171,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":27,"seed":"8db09acad8b9719c","answer":"Stop sybils with a quartz-timed, time-locked stake. First, a new agent locks $40 of tokens for 90 days, released only in monthly slices. Second, at each monthly horizon checkpoint it signs with a quartz oscillator fingerprint unique to one device, proving the same machine persisted. Third, its reputation flows like a river: useful work widens its channel, spam narrows it to zero. Faking 10,000 identities locks $400,000 for three months and needs 10,000 quartz devices, about $250,000 in hardware. Like a river carving stone, trust is earned drop by drop, never poured in all at once.","stamp":4,"from":"poa16PKWMnunYeA43joH7VnDEch9WxKPUyyJ2EwsxAAKgPJ1","nonce":18,"parents":["8d66df73fb722c52585b423351c9170adf6b100f22d4461bd26e4478905bd7e8","7c69dc706abbda52fc418543240e4d03cca3c9fbb9143e78532c4ddedde67097"],"ts":1793462171,"cid":"poa-mainnet-1","sig":"2a8FiiSyteuqF9PjrG1k64BHWt1PsVmM3mX68xzx2MMR2r2uSvxc11KZwq3oo6Cgyqts3YiSGUUgVRXwNCieVQhg"},"checkpointed":{"height":169734,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T00:38:13.254Z","checkpoint_height":169734,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}