Other protections are obviously good, but less effective like:
- buy your domain on different TLDs and registars and host the same site and all services that can be duplicated on them, citing all other domains you own on all, as needed you have well established evidence that you are the right owner and others if one disappear easily find the others;
- keep you customers informed of all your domains/services/public part of your infra so in case of issues (of any kind) they understand that something happen and probably most interesting one can still find you;
- mirror your websites on ZeroNet and advertise them in all officials ones, of course 99.9999% of business customers never ever even try ZeroNet for curiosity but it's evidence, something working and something you can potentially embed in other software (depending on your activity).