SustaTrace

Evidence layer

Supply path / product passport

CX339 path record and seal link

SustaTrace records the product passport. CX339 standardises that record; sealing and anchoring on CarbonX3 remain optional.

Clear boundary

CX339 is not a carbon credit, token or investment product. It is a role-based evidence standard for supply path and product passport.

Three layers

From path to optional evidence sealing

Record starts in Trace · seal in Micro Ledger · anchor on Green Chain

Standard

CX339

Role-based evidence standard for supply, shipment and product-path data. This is SustaTrace’s primary alignment.

Seal · Evidence Sealing

Micro Ledger

Integrity checks and sealing of step records (Evidence Sealing) are live today. Automatically wiring a Trace passport into that line is optional. Raw operational data is not written to the chain.

Anchor · L2Anchor

Green Chain

Anchors seal roots to L1 via L2Anchor / PoA. It does not replace Evidence Sealing; it anchors roots. CX3Scan explorer + /l2-evidence are live.

CX339 scope

What is recorded in the product passport?

The goal is not selling data — keeping the batch path auditable

  • Lot / batch identity Traceable identity bound to the product passport via UUID / QR
  • Plant and origin step Record of which plant and lot the batch left from
  • Shipment and handoffs Warehouse, bonded store, customs and logistics events
  • Timestamp and actor Who recorded which step, and when
  • Document link Reference to waybill, certificate or extra evidence
  • Controlled update Supplier step updates under the data-provider role

Flow

How the evidence line advances

Step 1 and 4 are core · steps 2–3 are the optional sealing path

  1. 1

    Path record — SustaTrace (core)

    Lot, plant, shipment and handoff steps gather in the product passport. A CX339-aligned record is formed.

  2. 2

    Seal — Micro Ledger Evidence Sealing (optional)

    Evidence records enter an append-only seal chain. Evidence Sealing is live as a product; automatically sealing the Trace path is a customer rollout / roadmap item.

  3. 3

    Anchor — Green Chain L2Anchor (optional)

    The seal root binds to L1 via L2Anchor and is verifiable under PoA finality. Green Chain does not replace Evidence Sealing.

  4. 4

    External check — UUID / QR (core)

    Buyer or auditor checks the same path via UUID/QR. For sealed records, CX3Scan explorer + /l2-evidence are live today.

Roles

Who records what?

Each record is created or updated by the right actor

Operator / Producer

Writes template, batch and production steps into the product passport.

Data provider

Supplier or logistics side applies controlled updates.

Buyer / Auditor

Checks the same path externally via UUID / QR.

This marketing site has no Trace L2 API. Micro Ledger Evidence Sealing and CX3Scan /l2-evidence are live as products; wiring a Trace passport into that line is optional. Raw operational data is not written to the chain. Authorised role records do not replace accredited verifiers or official portal processes. Family links: CarbonX3.

Let’s plan the evidence line together

The CX339 path record stays in Trace; Evidence Sealing is bound when needed.