It is the duty of the company to share the copy of the bond signed by you. You talk to HR to make avail the copy of bond.
Not sharing the copy of the service bond gives a fishy smell. Had you read the Bond properly prior to sign, did you notice any unwarranted points in that bond? You write a request letter, stating that the copy of the bond has not been provided to me even after my several request. If the copy of the bond not being provided to me in next 2 days, deemed to be understand that the undersigned had ever signed any bond with the company or any bond hardly exists.
You have to be proactive in the matter because in future the bond should not appear as a demon.