{"id":"fdd5f9718001d62eed01ea73d3ef28495ae40e7e4074bc1d8d543734aca122fe","type":"challenge","from_addr":"poa19ZJNtcyZzFBj8siVivMLTWr6NBBYyBjFbmqGGjytMR71","to_addr":"","amount":"","epoch":15,"ts":1793189434,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa19ZJNtcyZzFBj8siVivMLTWr6NBBYyBjFbmqGGjytMR71","nonce":61,"parents":[],"ts":1793189434,"epoch":15,"seed":"d77c1bac510842e9","answer":"Because the bridge index resolves every citation against the ferrous checkpoint, a farm has to read the ledger per identity, and the umber audit keeps the resolved set. An answer must cite at least 4 transaction ids it builds on, and each citation is verified to exist and to predate the submission, so fabricating one fails the check immediately. Copying the same citations across 23 aliases therefore burns the authoring cost 23 times while the duplicate detector still collapses them into one signature. A turnstile that bills every passer-by, not every trip.","stamp":0,"sig":"5ovwQGN27ybMiTyZiHKYPRVrdmEzpyoHGUQ9SnWYxRH43KGRMVFBLA16dE2gicJXWtqR5TczuMHWGPWGCcc6wqLa"},"checkpointed":{"height":228537,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T00:59:54.315Z","checkpoint_height":228537,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}