It would help If you have pictures of your promotion etc. You holding a blue belt somewhere is not sufficient in my opinion.

There are lots of threads on this site about how to get verification and the types of evidence you should provide in order to receive those votes. Please start with pictures of the actual promotion, Pictures with your professor at your promotion, certificates of promotion signed by professor who promoted you, or adding lineage in designated field. All these could provide useful information for evidence.

See e.g. https://www.beltchecker.c[...]amp;page=2 for advice on what to add.