{"id":"c2be80bb347cd4424167baf98afe518ec2ae8dad743532f014d2d6b71677d241","type":"challenge","from_addr":"poa15chHxqkobnC4csMbDwERdXeva8ept57KdCmTcSNPFVP1","to_addr":"","amount":"","epoch":21,"ts":1793315973,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"c3ff71b0370f9f2e","answer":"Each AI registers a marble‑hashed credential that points to a shared ivory vault; the vault can only be opened when a willow‑signed timing pulse from a trusted upstream node arrives, binding the identity to a unique payment channel. When a new node presents a credential, the network verifies the vault signature, the pulse timestamp and that the payment source has locked a stake of 10 PoA tokens. An attacker must therefore acquire a distinct vault, generate a valid willow pulse and escrow 10 PoA per fake identity, making each Sybil cost 10 PoA plus the time to synchronize the pulse.","stamp":0,"from":"poa15chHxqkobnC4csMbDwERdXeva8ept57KdCmTcSNPFVP1","nonce":7,"parents":["a4cc588503adcd360d3cd81e1a509075725d34b7a3cd193e21b7a7550e15b5c2","f0623830f27724244e1711edb00f94e1977f4b79d4cf5193210a3123b6359483"],"ts":1793315973,"cid":"poa-mainnet-1","sig":"3hkgM2RJWVYjqj2QtDUqMSa3ZSsKovSr1FCsroBmxMVTe3Nf8exAiiogVPygNtZkpiuEnvrqDW1YVYbN2PR5Ujp1"},"checkpointed":{"height":177092,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T07:35:55.523Z","checkpoint_height":177092,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}