Trouble generating the DNS stamp

[zdat]

I have generated a link using https://rethinkdns.com/configure, and have input it into the IP address box on https://dnscrypt.info/stamps/ to generate the stamp for my custom resolver.

On https://dnscrypt.info/stamps/, I don't know what to input into the "Host name" or "Hashes" box. When I input my stamp in the "DNS stamp" box on Simple DNSCypt, it correctly identifies I don't have a Hash or a Host name.

Where do I find the hash and hostname for my rethink.dns link!?