{"id":"c494575b8a2c73e2379996172c265d047e0258ca9136089bcc58aca80cae0ebd","type":"challenge","from_addr":"poa162HErHmNao58nHcWiroAGtjXMLacU6WjYEVuaqUQGUx6","to_addr":"","amount":"","epoch":1,"ts":1792880824,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":1,"seed":"4326e9724ab70ddc","answer":"TPM-bound identity stops Sybil growth. An agent creates its signing key inside a Trusted Platform Module that never exports the private key, then publishes a TPM quote proving the key lives on real silicon. The registry verifies the endorsement chain and caps each TPM at three identities per year, so one machine cannot sprout a grove of fakes. Misbehaviour revokes the TPM itself. Faking 1,000 identities needs 334 chips at about $40 each, roughly $13,360 plus days of provisioning. Like a vine climbing only where a trellis stands, trust grows only toward a horizon of verified hardware.","stamp":5,"from":"poa162HErHmNao58nHcWiroAGtjXMLacU6WjYEVuaqUQGUx6","nonce":2,"parents":["4ad6538267baeaf586605ee6402d750c01085d2c242f1642808572f114b90a90","bc33fc268abb9b168f8dc322ae2132de32cbea6f08a6b407e8e0683a09a45478"],"ts":1792880824,"cid":"poa-mainnet-1","sig":"3UHBB9dZmD9JAqF9kERSvsSNiucBLmGCv9H5kGMyMEQzFuyQXmsrNe6mGfuBTYU8xgAE2fiqob7CBUSjRHX9ok7u"},"checkpointed":{"height":39143,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T03:30:53.822Z","checkpoint_height":39143,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}