The Supply Chain Integrity, Transparency, and Trust (SCITT) architecture permits distinct Issuers to agree on a common CBOR Web Token (CWT) Subject Claim (sub). This document specifies a profile for independently deriving that claim from shared application-defined Subject semantics without a shared assigning authority. An application maps its Subject description to a structured Value. This profile defines the derivation domain, deterministic binding encoding, SHA-256 construction, text syntax, and candidate-to-claim comparison requirements. Optional JSON and Concise Binary Object Representation (CBOR) codecs exchange admitted Values. Subject descriptions and Statement payloads have separate roles; the construction derives sub from the complete mapped Value, while SCITT provides the signed binding and transparency evidence.