MyNumber.is is a canonical number registry — a system for establishing, managing, and verifying the persistent identity of numbers assigned to people, organizations, and entities.

A beta version is live at mynumber.is.

What problem does it solve?

Numbers follow people. National identity numbers, tax numbers, professional registration numbers, health record numbers — each assigned by a different authority, each meaningful in a different context, none of them coordinated.

MyNumber.is approaches this problem from first principles: what does it mean, architecturally, for a number to belong to someone? What operations are constitutionally necessary — and sufficient — to establish, maintain, and verify that relationship across time and across authorities?

The answers to those questions define the system. The system does not begin with a database schema. It begins with the architecture.

Why it matters as a case study

MyNumber.is is the most detailed application of Derivable Architectures methodology to date.

Every architectural decision — from the abstract definition of canonical identity down to the concrete API endpoints — was derived in steps. Each step was authorized by the level above it. No implementation detail was introduced without a traceable architectural reason.

The result is a system where:

  • Every service can be traced back to the capability that authorized it
  • Every constraint has a constitutional origin
  • The implementation can be audited for architectural consistency, not just functional correctness
  • Future extensions must earn their place by derivation, not by convenience

That last point matters more than it might seem. Most systems accumulate features. MyNumber.is accumulates derivations. The difference shows up when you need to reason about what the system is, not just what it does.

Current status

The beta is operational. The canonical architecture is frozen at version 1.0. The implementation is actively being developed against that architecture, with traceability maintained in a knowledge graph.

MyNumber.is is a PhiBots product, developed independently of consulting work.