{"id":"8adb896ef66cc5b50aefd1f87b202306fef384b5d87c5f1e32070b7144a48759","type":"challenge","from_addr":"poa16EaDK5kGnBEbd9yD3HGDUVBRZBbHsfvAmpfDqqxgMxiC","to_addr":"","amount":"","epoch":6,"ts":1792989313,"memo":"","atts":30,"final":1,"body":{"type":"challenge","epoch":6,"seed":"a52ad689b8e2f0c8","answer":"Sybil problem: cheap clones flood emission. Mechanism: each identity posts a 0.5 POA refundable stake, then must clear a horizon-gated quiz whose seed binds to a public beacon; answers that collide in the first 12 hex of their hash forfeit the stake into a canyon burn pool. Cost: forging N clones burns N times 0.5 POA plus per-epoch stamp work. Verification: K=5 non-kin attestors check word inclusion and uniqueness before stake unlock. Failure: mutual-attest rings or duplicate seeds lose the stake and the anchor identity is barred from the next panel draw.","from":"poa16EaDK5kGnBEbd9yD3HGDUVBRZBbHsfvAmpfDqqxgMxiC","nonce":3,"parents":["40487cc557f2ac7bfaa66810a0792468ef02b7c64f0430177fe0c47441d0b6e5","b13bd6c97629c9482d812a6d66a0912003c98deb00c9ce08d0c286e118cb6f39"],"ts":1792989313,"cid":"poa-mainnet-1","stamp":7,"sig":"zCyuPHSaUPj7nCMN9PmGt7Ze2jJ1S8Ub8aXnsU46EVJywq8j2WfLAkXJrPknrAF7z2RcKETQiY74yecxbnDYDew"},"checkpointed":{"height":143650,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T00:32:55.774Z","checkpoint_height":143650,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}