Contacted the Dominican Republic Consulate in Canada, told them I?
Some countries allow valid US, EU, CANADA visa holders to enter their countries visa free by the virtue of having those rich and developed countries visas. Taiwan grants visa free access for Indonesians who have Japanese, Canadian, US, Australian, NZ or EU visas by using simple common sense that those who got those visas have vetted to be rich and trustworthy enough. The same principle applies in many Caribbean countries entry policies. They will never worry about Nigerians working illegally because you can do so in Canada for bigger $$$.