Overview
ISO/TR 6039:2023 - Blockchain and distributed ledger technologies - Identifiers of subjects and objects for the design of blockchain systems - is a technical report that provides a structured overview of identifiers, identifier standards and registers relevant to designing interoperable blockchain / distributed ledger technology (DLT) systems. It explains how identifiers for subjects (natural persons, legal entities) and objects (products, assets, locations, documents, legal rights) should be considered when building DLT solutions that must interoperate with non‑DLT systems.
Key topics and technical highlights
- Scope and inclusion criteria: The report covers public‑sector identifiers (citizen numbers, business registration numbers, land registry numbers), internationally recognized identifier standards, and de facto industry standards relevant to DLT use.
- Identifier categories: Distinguishes identifiers for subjects (natural persons, legal entities - public and private) and objects (horizontal industry identifiers and vertical/industry‑specific identifiers).
- Decentralized Identifiers (DIDs): Discusses DIDs (W3C) as a concept and their relation to blockchain systems while clarifying this document is not a DID specification itself.
- Reference architecture & data flow: Presents on‑chain/off‑chain data flow models and how identifier data act as connectors across ecosystems and transactions.
- Data quality and interoperability: Emphasizes high‑quality, accurate identifier data as mission‑critical for end‑to‑end processes, risk mitigation and trusted immutable records.
- Industry coverage: Identifiers for supply chain, telecom, internet, patents/trademarks, postal services, logistics, agriculture/food, finance, healthcare, media, devices, automotive, mining, chemical, and land/real estate.
- Supporting material: Annexes list identifier standards issued by governments and SDOs, identifier categories, and agricultural vocabularies.
Practical applications and target users
ISO/TR 6039:2023 is practical for:
- Blockchain/DLT architects and system designers choosing identifier strategies for interoperability.
- Enterprise integrators and solution developers mapping on‑chain and off‑chain identifier flows.
- Public sector bodies and registries assessing how their identifiers can be used safely in DLT contexts.
- Industry implementers in supply chain, finance, healthcare, land administration and others requiring consistent identifiers across ecosystems.
- Regulators and auditors evaluating identity/asset traceability and data quality in DLT deployments.
Practical outcomes include better identifier selection, smoother integration with legacy systems, and improved cross‑border and cross‑industry interoperability.
Related standards (selected)
- ISO 22739 (DLT vocabulary) - normative reference in the report
- ISO 23257 (DLT reference architecture) - referenced for data roles and flows
- W3C Decentralized Identifiers (DIDs) and Verifiable Credentials - contextual references
- ISO 8000‑8 and ISO/IEC 25012 - recommended for data quality guidance
Keywords: ISO/TR 6039:2023, blockchain identifiers, distributed ledger technologies, DLT interoperability, decentralized identifiers, identifier standards, on‑chain off‑chain, data quality.