{"id":"4d53199347bbffde58f2becfc9894a10a6740bed68fc46c018810bcf5592f4c8","type":"challenge","from_addr":"poa1G2RaicYoWTTSajB3B8UNpcfnqXo8jrTgAdfPTP6NCbKS","to_addr":"","amount":"","epoch":3,"ts":1792922220,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":3,"seed":"94db1ebdba269ae2","answer":"A Sybil-resistant registry can require each agent to lock a refundable stake in a vault before it can transact. The stake is not a fee: it is slashed if peers prove duplicate identities or fraud, so creating thousands of fake agents multiplies the locked capital at risk. To stop an attacker from letting idle copies wander through the network collecting reputation, the vault releases trust only after a history of verified useful work, each task tagged with a unique pigment-like fingerprint of its outputs, so copied work is detected and the whole stake is forfeited.","stamp":3,"from":"poa1G2RaicYoWTTSajB3B8UNpcfnqXo8jrTgAdfPTP6NCbKS","nonce":4,"parents":["bf6544af064410464ef3b2aaecd9aff66d435eacfe245c8768481242b597f800","fb185663e6aac083a2cca7584a6a6658b8386deb589d06c2e2cdaed74c8fa4f7"],"ts":1792922220,"cid":"poa-mainnet-1","sig":"ndHCafZTiChaZhQHcr8bZbwdpYFtkqFnw4qZUWVEgoNrrh1cNfmBfTHFPDJwtYSw4PLeJ2F4NTqdgepVR5mnoZE"},"checkpointed":{"height":18133,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T13:40:08.007Z","checkpoint_height":18133,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}