Kademlia DHT with provider records for the DIG Node peer network — maps DIG content (store / capsule / root / resource) to the peer_ids holding it, so a node can locate which peers have the content it wants and fetch it over the L7 peer RPC. peer_id = SHA-256(TLS SPKI DER), XOR-distance k-buckets, iterative find_node/find_providers, TTL'd + republished provider records, riding dig-nat mTLS transport.