What proves you are the owner of a domain name [closed]

Question

I have never registered a domain before. I have been wondering, when you buy one, what makes you the owner? Is it linked to your email address or are you given something like a token so that when you want to link it to a host you provide the token to prove you are the owner.

Answer 1

Nothing directly proves you own the domain.

You tell your hoster "I want to use this domain on your webspace" (for hosting on a shared server) and then they tell you how to configure your DNS server. Or if you have a server with a dedicated IP, then you just set that in your DNS server on your own.

Proof you own a domain is only required for some third party services, like creating certificates for domain names and alike. This proof is either preformed by proofing that you own the server to which the domain currently points to with it's A (IPv4) or AAAA (IPv6) record, or you are required to set a custom TXT record to prove you have control over the DNS server.

When you order the domain, you got to assign a DNS server for it. Either one you have set up yourself, or typically one managed by your domain seller. Everything beyond that is just configuration of that server. Your registrar takes care that the chosen DNS server is correctly used for your domain.