CVL KRA: https://validate.cvlindia.com/CVLKRAVerification_V1/
CAMS KRA: https://camskra.com/PanDetailsUpdate.aspx
NDML KRA: https://kra.ndml.in/ClientInitiatedKYC-webApp/#/ClientinitiatedKYC
KARVY KRA: https://www.karvykra.com/KYC_Validation/Default.aspx
DOTEX KRA: https://www.nsekra.com/
After validation, you will be able to trade in one or two days.