I built a simple way to link a website or domain to a phone number, email, webfinger, and profile information. The main method is a JSON-LD document at /.well-known/telweb. For phone numbers only, there is a fallback using a TXT record on the _telweb subdomain. The profile field is intentionally flexible. It is simply defined as an object where you can put any information you want. You can try it in the Dialer section.