The information I have says that 1xBIT bookmaker is anonymous and does not require KYC verification. To confirm this, I will quote another user who claims to have used services of this bookmaker without data verification:
You are working as a promoter of 1xbit that's why you are suggesting 1xbit to use. If 1xbit has no policy, no terms give 500% bonus then still I will not use 1xbit and I won't suggest anyone to use 1xbit. Because 1xbit is a proven scammer and you know that very well. I have not gone to your feedback but undoubtedly you have received negative trust for wearing the signature of 1xbit.