Generate a Truely Unique UUID

Watch this closely! You will never ever see this ID again at this place:

4fc56dde-0c2d-421f-8ef6-71db573c9b4dThe URI for this is: https://rfc4122v4.api.tuuid.com/4fc56dde-0c2d-421f-8ef6-71db573c9b4d

1591801 truely unique UUID's were so far generated. Potential collisions prevented: 0

What is an UUID?

What means truely unique?

Is there a warranty for this service?