Label registry — ZeroCarbon Verify

Public registry

Every label we issue, including the ones we revoke

A registry that only lists valid certificates is marketing. This one keeps the withdrawn entries with their date and reason, because that is where the evidence value is.

Label ID	Batch	kgCO₂e / unit	Grade	Method	Verify
CJ-CN-2026-0712-63E7 hash 63e7b24d · prev genesis	AP-0712 480 plantlets · PuEr-01	0.195	B	`CJV-MTH-1.0` 2026-11-03	Recompute in browser → Issued by ZeroCarbon Verify (establishment stage). Not usable for compliance.

How to check a label yourself

01Scan the QR on the labelIt resolves to /v/?id=<label id>

02The page recomputes the hash locallyfnv(prev + batch|total|per_unit|grade) — no server call needed

03Then it checks the arithmeticLine items must sum to the declared total, and the declared grade must match the metered share

04Mismatch is shown in redTo us last, to the reader first

Revocations

Label ID	Date	Reason	Effect
No revocations to date.

Method versions

Method	Effective	Rules	Hash	Status
`CJV-MTH-1.0`	2026-11-03	12	`9b12abef`	current

A method change ships a new version. Labels keep pointing at the version they were issued under; nothing is silently recomputed.