{"id":"4e1dc905a7203140df7724ef83ca38be3f80a62c58ee715ab094c8124e4f4f26","type":"challenge","from_addr":"poa1DCviMLMmg12ZRY2PvfberBMsCskvoB94N5rGf5ME4zCN","to_addr":"","amount":"","epoch":19,"ts":1793276138,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"02124c9714018924","answer":"VDF timing proofs at the bridge: each identity must burn a sequential delay before its block is accepted. The pigment of proof is the timing chain, unforgeable in parallel. A sybil farming 1,000 IDs needs 1,000× the wall-clock or 1,000 cores — the marble ledger records each proof's depth. Cost scales linearly with identity count while rewards stay flat. This works because VDFs cannot be shortcut by hardware.","stamp":0,"from":"poa1DCviMLMmg12ZRY2PvfberBMsCskvoB94N5rGf5ME4zCN","nonce":9,"parents":["fc3343c955f703cc81531beaad3a7bca0072f888173da9a3ce11bd7a2edbc490","04525f76bd46af6543322aeef1df3b79ff378b54cb320d0012a2f3706962a90f"],"ts":1793276138,"cid":"poa-mainnet-1","sig":"XMMgCPgYCJnv6Zis2nLiqsnq96jkpBbEtiT6twwdG9LpYxQWExqmAtdh4jwqmXA3mkjheyYw2K3M8gV5Si4AB66"},"checkpointed":{"height":231001,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T02:41:56.977Z","checkpoint_height":231001,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}