1) You must add glue records (child nameservers) to your-domain.com from your domain's registrar control panel. Example:
ns101.your-domain.com -> nameserver ip
ns102.your-domain.com -> nameserver ip
pns101.your-domain.com -> nameserver ip
pns102.your-domain.com -> nameserver ip
pns103.your-domain.com -> nameserver ip
2) Change the NS records here:
From ns101.old-name-server.com to ns101.your-domain.com
From ns102.old-name-server.com to ns102.your-domain.com
From pns101.old-name-server.com to pns101.your-domain.com
From pns102.old-name-server.com to pns102.your-domain.com
From pns103.old-name-server.com to pns103.your-domain.com
3) Add these A records here:
ns101.your-domain.com -> nameserver ip
ns102.your-domain.com -> nameserver ip
pns101.your-domain.com -> nameserver ip
pns102.your-domain.com -> nameserver ip
pns103.your-domain.com -> nameserver ip
4) Change the name servers from the panel of your domain's registrar to:
ns101.your-domain.com
ns102.your-domain.com
pns101.your-domain.com
pns102.your-domain.com
pns103.your-domain.com
5) (Optional) Change the Primary NS in the SOA settings to one of your branded servers.
After 24-48 hours your DNS branding will work fine.