Do we have any circular/ higher court order regarding “ The first purchaser is the actual owner” subject to all evidence in support of first purchaser.
What do you mean by raising this kind of doubt?
When you purchase a product from a shop, are you not the owner after purchasing it?
Or do you need any circular/order from government/court to certify you the owner of the product purchased by you?
The dispute is for the subsequent buyer only and not for the first purchaser, let him file a suit to declare his title, you can defend your title on the basis of the registered document in your favor, let the court decide after that.