Why claims need a chain of custody
Environmental claims become durable when the data lineage is as clear as the physical movement of goods.
A claim about a supply-chain reduction is only as durable as the evidence behind it. That evidence has a journey: from project activity, through measurement and verification, to allocation and retirement.
At each stage, context can be lost. A tonne can become detached from the intervention that produced it. A buyer can inherit a number without inheriting the boundaries, assumptions or limitations that make the number meaningful.
Designing for handoffs
A chain of custody solves this by making handoffs explicit. It records who generated the outcome, which value-chain participants are linked to it, and what has already been claimed. The aim is not paperwork for its own sake. It is to preserve meaning as an outcome moves through a market.
For finance teams, this creates an audit trail. For sustainability teams, it creates a defensible claim. For project owners, it creates recognition for the reduction they actually delivered.
The strongest climate instruments are not the loudest. They are the ones that remain intelligible when someone asks a difficult question two years later.