Mlkut Name System — MNS

get rate limited names by Blockchain, someone can register in bulk and transfer to users later, every update (other than ownership transfer) is offchain, and you get two extra goodies; 1) shorter IDs 2) key rotation with arbitrary smart contract, so instead of a bunker you can use any logic for someone to help you with custody, and you can change to any level of self custody as you feel more comfortable... Any innovation on key management on any Blockchain can be back ported to MNS. Now that I mentioned this, Rootstock addresses are derived from secp256k1 so theoretically you can search for the names owned by an npub.