Supply Chains
The chain of custody, made navigable
Two commodity families, two structurally different chains, one principle: every transfer of ownership is registered, verified, and auditable. This is the map we build the platform around.
Grounded in the frameworks the market already trusts
Responsible sourcing is not a marketing claim — it is a set of documented, auditable processes defined by international frameworks. Metals and minerals chains follow the OECD Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas, with the CRAFT Code providing artisanal producers a practical on-ramp to formal markets. Rough diamonds move under the government-backed Kimberley Process Certification Scheme, with the Responsible Jewellery Council certifying custody across the wider jewellery trade.
The OECD five-step framework
Every chain we model maps onto the five steps the OECD asks of companies sourcing from conflict-affected and high-risk areas.
- Step 1
Establish strong management systems
A documented supply chain policy, internal accountability, and record-keeping across every transaction.
- Step 2
Identify and assess risk
Map the chain of custody, know each counterparty, and document risk factors and the decisions made about them.
- Step 3
Design and implement a risk response
Mitigate, monitor, or disengage — with constructive supplier engagement preferred over abandoning legitimate producers.
- Step 4
Independent third-party audit
Independent assurance at defined points in the chain — in practice concentrated at the refiner and smelter pinch point.
- Step 5
Report annually
Public reporting on due diligence policy and practice, so downstream buyers can rely on documented, reasonable effort.
Macro-chain navigation matrix
Select a stage to see who performs it, what registration it requires, and which documents and frameworks apply. Amber markers are formal audit checkpoints — events performed on the chain, distinct from the actors themselves.
Mine
Custody stageOECDCRAFTRegistered artisanal miners, cooperatives, or ASM Mineral Producers (AMPs) extract the raw commodity. Under CRAFT, an AMP self-issues an annual CRAFT Report as its passport to formal markets.
Registration requirement: Proof of legal operation, location, and mining license or registration where applicable.
The platform lives at both ends of this map
A chain of custody is only real if it is recorded where the work happens. Institutional buyers monitor and source from the web platform; field actors — assayers, miners, buying stations — record custody events on mobile tools built for the first mile.
Overall supply health
43.8 kg of 70 kg open demand
On track · 4.6 kg/24h
Regional pipelines
Orders
New orderDemand posted here cascades down the chain: regional pipelines fill against committed orders, with chain health visible at every stage of the map above.
Obuasi Cooperative Ltd · 2.4 kg · declared 91.0%
Digital assay receipt
BATCH-8836 · 2.9 kg
Scan to verify — no account needed
Each of the three assay checkpoints in the metals chain becomes a scan, a certification, and a QR receipt — recorded against the consignment, verifiable by anyone downstream.
Operating somewhere on this map?
Whichever stage you occupy — mine, lab, trading desk, or refinery — you can register on the platform and claim a free, verifiable Nelum ID.