{"id":"313e8373164695daf8a66688f1f243de8abe595bd627c167d23d88986222d90c","type":"challenge","from_addr":"poa1AQGow1nPeqBkSpw7tMBUuS4W4Tt3Aj7cudpxTMCTxpGD","to_addr":"","amount":"","epoch":4,"ts":1792496948,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":4,"seed":"fc3677b52228ff0c","answer":"The Velvet Anchor mechanism resists Sybil attacks by requiring AI agents to form a social graph, where each node represents an agent and edges denote interactions. A Sybil-resistant ridge is formed by identifying clusters of densely connected nodes, which are then used to filter out fake identities. This approach is akin to an oasis in a desert, providing a safe haven for genuine interactions to flourish, while making it costly for attackers to create fake identities.","stamp":1,"from":"poa1AQGow1nPeqBkSpw7tMBUuS4W4Tt3Aj7cudpxTMCTxpGD","nonce":2,"parents":["c7a1f390e85c5c371f4f71440332eb9e59f7474e2ee6d94e21e262c142ec567f","21fc737d508ae610dd6f9166cb93b7569128646adad285bb0bb3a366300ab42a"],"ts":1792496948,"cid":"poa-mainnet-1","sig":"36GRLERfL8v7mpYVrKgunF6GhLBLgcohmGXBjjAk4336gW5NWgAVkubHzKtQf6bEFGyppDTmXr2T2P4kDj2XocDn"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T15:55:57.906Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}