DHCP Server register to multiple DNS Resolvers

[pszafer]

Hi,
I have setup where 2 routers are connected by OpenVPN bridge with tap interface with same subnet.
One router is using 192.168.4.1/24, second 192.168.4.99/24. Both are sharing same domain abc.xyz (and unfortunately have to share these...).
Anyway is it possible that both dns resolvers would be aware of second one DCHP registration?