When registering for Kryptonite's ATPO Program here, you are asked for a bicycle make and model. With a custom-built, I have no idea what to provide there. I contacted customer service, with no reply after a week. Given the limited time frame where one can register for the ATPO Program after lock purchase, I am getting worried. From the corresponding terms and conditions, I see nothing that would exclude custom-builts, which would at least explain asking for a specific make and model.
From the Kryptonitewebsite, looks like both the make and model are open-ended text entry forms. So I think you’d be ok to write something like:
So if you had John Jones make your bike and you’re Carla Carlson then you could say:
Model Year: 2020
If you built the frame yourself, then I think you could name it anything you want.
For kryptonite, they need the bill of sale if you bought it or an appraisal if you built it yourself.
Kryptonite is a little famous in being ... slow ... in paying out on their “insurance” so you may be better off just listing your bike on your homeowner or renters insurance policy.
What’s important to remember is that from the perspective of kryptonite, insurance companies, the police, etc is that the frame is the bike for all intents and purposes. So you use the frame number for the serial number of the bike.