Are you going to used the upwork tracker for the hours of work? Let me know if this is sufficient and I can work for you.
Op is going to pay via bitcoin so there is no chance to work with upwork tracker as that is worked for upwork hourly projects only as further as I know. I think op will allow work on his/her computer remotely or have to allow online time tracker like
worksnaps to track the time of working for the project.