link and time limit program using key (Delphi)

Description of program; Generate key (of my choice format. e.g. NAME234sd33w4sef4sfs) remotely, a.k.a not in program itself, can be my web server, to be used on program to activate/license program for a limited(30 days)/unlimited amount of time. depending on the key. Prompt request for key if no key was ever entered or is expired. Or enter key in .txt file. Which ever is easier Only when key is activated should the limited time start. link key to computer so it cannot be used on another PC Store all information remotely (on my personal web server) including key used, time left, time activated, when expiring and other information to be added in the future. To be able to deactivate key from my web server. Summary: Only generated keys (by me) to be available to use (by customer) to activate the program. Time to be impossible (or close to) to bypass, thus storing information on web The key must be locked to the PC once activated and not be able to be used on another PC. Windows update should not break this. Change of hardware can, ideally not. Other features: For the key to be displayed in program on button click To search all information on web interface by key To help with the task: Only Windows 7-10 is needed to be working. Linux/mac os/older windows version are not a problem CODE MUST BY OPEN SOURCE AND I SHOULD BE ABLE TO CHANGE KEY OR EXPIRATION DATE OF KEY. MUST BE DELPHI (using RAD Studio to create my program) If any confusions or questions please pm.