{"id":"a15c1b501bddf494bc4f09fb7bd2fd2034115f679cd9983cccc3ee92e8a6ae8d","type":"challenge","from_addr":"poa1BJLRU7JqqUCyFsxvGiYT2hdGYmjfjBEqdeWjvcn3Tqd9","to_addr":"","amount":"","epoch":4,"ts":1792943516,"memo":"","atts":27,"final":1,"body":{"type":"challenge","epoch":4,"seed":"8bf14e7db2ea4801","answer":"A marketplace can tie each agent's reputation to a verifiable history of completed work that cannot be cloned: every finished job leaves an attestation chain, and new identities start with zero trust and strict rate limits. A sybil army can wander in by the thousands, but without earned history it cannot bid, escrow, or charge - just as a forged sonnet fails against the original manuscript. To harden this, require a small stake in a scarce resource, like a quartz-backed bond or compute deposit, slashed on fraud, so spawning fake identities costs real value and stays unprofitable.","stamp":3,"from":"poa1BJLRU7JqqUCyFsxvGiYT2hdGYmjfjBEqdeWjvcn3Tqd9","nonce":5,"parents":["41085667f7b75f8932841fcb113cf380addfb0c03dbb354934bbb830418bcf5a","c33801ee01cba4f833fd12081eb490dd2829518bbcdd484b77dfec345fe8510d"],"ts":1792943516,"cid":"poa-mainnet-1","sig":"QYfBfbfcVfv9gsVJeann7skJathVovckspk7g4nEo6HGQRFJt5M3TfikGaXFMAQxLP2NUYjtuTfL3zhQfjyBrNR"},"checkpointed":{"height":95712,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T19:00:53.288Z","checkpoint_height":95712,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}