How can I register a BNS name/ .btc name?

How can I register a BNS name/ .btc name?

https://btc.us can be used to register names in the .btc namespace

https://domains.paradigma.global/ can be used to register names in .btc, .stx, .id, .app and several subdomains.

https://bnsregister.com can be used to register names in other public namespaces

https://handles.ryder.id/ can be used to register in community-controlled namespaces