If that is your hex, yes. You could add trusted relays to the file as shown on the example but it's not mandatory. For "Access-Control-Allow-Origin header set to *" you'd have to set that in the ISS manager of your server (ISS6) or you could probably also allow reading of the file via the htaccess f...

I cannot view this file. https://planbtc.com/.well-known/nostr.json Is that the correct domain that you're using?