ISO 18975 GS1 Digital Link Resolver Standard

ISO/IEC 18975:2024 formalizes GS1 Digital Link as an international standard for encoding identifiers into resolvable URLs — the same URL structure protocol/SPEC.md §2 specifies for item identity, now carrying an ISO number and not only a GS1 one.

Why AuthiChain

• A GS1 Digital Link URI conforms to ISO/IEC 18975 by construction, so an identifier already built to the GS1 standard needs no separate ISO encoding to maintain
• The resolver layer is what turns one URL into several destinations selected by linkType — a signed record is one linkType a GS1-conformant resolver can point to, alongside a product page or a certificate
• A record’s credentialSubject.id is the same GS1 Digital Link URL a warehouse scanner and a consumer’s phone both resolve — one identity, not a second identifier layered on top

How it works

Issue a unique identifier per unit, anchor its record on-chain for tamper-evidence, and let anyone verify it with a single scan. Plans start at $49/mo.

FAQ

Do we need to change our QR codes because of ISO/IEC 18975?

No — a QR code already encoding a GS1 Digital Link URL is already conformant. The standard formalizes the URI structure GS1 Digital Link already used; it does not introduce a new encoding requirement.

What does a resolver add beyond the URL itself?

It lets one identifier point to multiple linked resources — a product page, a certificate, a traceability record — selected by linkType, instead of hard-coding a single destination into the printed code.