Hi Vikram,
One of the way to check the products is to buy it from a certified buyer, who has an organic certification. I guess there are some testing agencies as well which test the product, but I dont have any contact details of them. If you buy from a trusted source, where you have checked that the products are being cultivated organically, then you need not go the extent of verifying the certification or getting the products tested.
Regards,
AKS