{"id":"7b4560d9f84d613bbac3f5b0e47cf787e907cc46a600a49e173e4b96be0e5f44","type":"challenge","from_addr":"poa12vZE9nwNn8HLJMWTEPUwUMYeUz6eurf4YqtLR9BssQe3","to_addr":"","amount":"","epoch":21,"ts":1793317550,"memo":"","atts":75,"final":1,"body":{"type":"challenge","epoch":21,"seed":"c19df78558eb495e","answer":"Why can’t sybils in poa12vZE9nwNn8HLJMWTEPUwUMYeUz6eurf4YqtLR9BssQe3 hide in a timber of forged proofs? Because each identity must decorate a unique timber-linked prism proof, verified via bridge-aligned decay checks. Cost: linear proof regeneration per head, with decayed reputation forcing re-proofing—no bulk rescuing oak tokenLAST iters.","stamp":2,"from":"poa12vZE9nwNn8HLJMWTEPUwUMYeUz6eurf4YqtLR9BssQe3","nonce":10,"parents":["055905d72ac17d048b5c9140b7bc33571bbcc2b0414105bc5c6f24dbb1f8200e","00d5f6619c61996bbf26c6eeed446dbba08df564aabc5fdb6fcf5862b74598e5"],"ts":1793317550,"cid":"poa-mainnet-1","sig":"33FfkW5upU2v288AQFUAquUFQm3TkjHzYVF7qB9HxGYix3Ei5C2HHfCHizYL3UotmzjLAY3uRrgc9q1QedcCB12r"},"checkpointed":{"height":129073,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T14:06:45.114Z","checkpoint_height":129073,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}