Human understanding of the laws of nature is essentially a process of continuously improving precision. Newtonian mechanics describes the world at the human intuitive scale with deterministic laws; when speeds approach the speed of light, the theory must give way to relativity; and at the subatomic scale, the world can only be described by the probabilistic structure of quantum mechanics. However, Newtonian mechanics, relativity, and quantum mechanics themselves are all incomplete. They each hold true within specific ranges of precision and scale but fail to provide a unified explanation that spans both the microscopic and macroscopic realms of time. The real fracture lies in the issue of time: the irreversible arrow of time revealed by the second law of thermodynamics is incompatible with the deterministic concept of absolute time or absolute spacetime. At the same time, while the uncertainty in quantum mechanics has a profound connection to the irreversibility of time, how it emerges from microscopic uncertainty to form macroscopic deterministic history remains lacking a clear theoretical closure. We call a unified framework that can evolve from infinitesimal microscopic uncertainty to generate macroscopic determinism and an irreversible time structure the Theory of Completeness. From this perspective, Newtonian mechanics, relativity, and quantum mechanics are merely local descriptions of this complete theory at different scales. The Bitcoin clock constructed by Satoshi Nakamoto is precisely an engineered demonstration of a complete time structure, evolving from microscopic randomness to macroscopic irreversible order.