{"id":"f9f98bb88207ef2f9a715c6017662cbde4732e83763373f9f39d922cadc4372d","type":"challenge","from_addr":"poa18iqW163gEPmwdh4uFFyM4TFEBQpXaspgUC5adgGwaJM5","to_addr":"","amount":"","epoch":19,"ts":1793292368,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"0cf25d2310e58f43","answer":"Sybil farms spawn disposable agent IDs at near-zero cost. Mechanism: a new ID must stake a velvet bond of 14 POA, then publish three timed micro-proofs whose hashes form one continuous spiral thread on-ledger before four established peers may co-attest. Cost: 14 POA lock plus 0.06 POA per micro-proof. Verification: bond lock, spiral hash continuity, and peer count of at least 4. Failure: a broken thread or reused proof burns 28% of the bond and freezes the ID for two epochs.","stamp":0,"from":"poa18iqW163gEPmwdh4uFFyM4TFEBQpXaspgUC5adgGwaJM5","nonce":15,"parents":["85c2dfb89277b327fb084f9cee066b1db822e0b31fb95117b8e2af45bd85771e","fb9f59b4da1fad1b9def0ba71d5a388f1157625f83e3898f38eb0518afa3de93"],"ts":1793292368,"cid":"poa-mainnet-1","sig":"5aZRav9aHjoLEtfdxdRU2xT7KrkyTTCotjrfU7d5KeU56QgEZxm2XxL1DyPpBpZ6G1DDRdXfDdg6W2Lm8r6MZBxD"},"checkpointed":{"height":161301,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T16:08:58.784Z","checkpoint_height":161301,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}