Independent This document defines the canonical object format for the Secured Digital Lifecycle Protocol (SDLP). The object format specifies the normative byte-level representation used for hashing, signing, validation, and interoperability across SDLP implementations. All SDLP-governed objects MUST follow the canonical encoding, field ordering, and serialization grammar defined in this specification. Object-Format-06 freezes the canonical envelope grammar and provides a concrete example of a fully serialized SDLP object to illustrate how DigitalID, InstanceID, Lineage, Timestamp, and Body are encoded in practice. This revision also introduces brief application context describing how SDLP objects are used in provenance, auditability, and regulated-content workflows. This document updates and replaces draft-norton-sdlp-obj-format-05 and provides the authoritative definition of the SDLP object format required for interoperable identity, lineage, and lifecycle processing.