About
Verusum builds the commercial verification infrastructure on top of the vsmcodex, the open reference implementation of value stream methodology applied to emissions compliance.
Purpose
The EU Carbon Border Adjustment Mechanism, and the broader carbon-border regimes that follow it, depend on accredited verification of embedded emissions in industrial goods. The accredited-verifier population is finite; the audit volume is not. Verusum's commercial layers exist to make accredited verification scalable without compromising defensibility.
Methodology lineage
The vsmcodex extends Sustainable Value Stream Mapping (Faulkner & Badurdeen, 2014) — a thirty-year analytical primitive in lean manufacturing and operations research, formalised for environmental and embedded-emissions analysis through Faulkner & Badurdeen's foundational work and the subsequent academic literature. The methodology engine the vsmcodex implements is not coined; it is the regulatory-compliance extension of an established academic and industrial practice that the EU CBAM methodology and the Commission's reporting specifications converge on.
Verusum's role is to maintain that reference implementation as Apache 2.0 open source, sponsor its development, and build commercial infrastructure on top of it.
Architecture
Verusum operates a sponsored open-source project plus commercial layers built on top:
▪ The vsmcodex - Apache 2.0 open reference implementation of the EU CBAM regulatory framework. Maintained by Verusum, free for verifiers, regulators, exporters, and academic researchers worldwide. vsmcodex.org →
▪ Verusum Report - a data-capture layer for non-EU industrial exporters preparing CBAM-compliant emissions packages.
▪ Verusum Verify - an audit platform for accredited CBAM verifiers conducting end-to-end verification engagements.
The architecture follows the pattern Confluent established with Kafka, Elastic with Elasticsearch, HashiCorp with Terraform, and Databricks with Spark: a sponsored open-source asset earning institutional citation rights, with commercial products built on top.
Standards alignment
Verusum's commercial platform and the vsmcodex reference implementation are aligned to the following regulatory and standards frameworks:
EU Implementing Regulation (EU) 2023/1773 — CBAM declaration framework
Delegated Regulation (EU) 2025/2551 — CBAM operator data structure
COM(2025) 783 — CBAM Phase 2 review and scope expansion
ISO 17029:2019 — General principles for verification and validation bodies
ISO 14065:2020 — Greenhouse gas validation and verification body requirements
The vsmcodex specification maintains explicit citation traceability from each methodology primitive back to its source regulatory document. The reference implementation is regulator-inspectable and academically extensible.
Open source as institutional posture
The vsmcodex is open source as a deliberate institutional choice. The reference implementation is regulator-citable; the academic literature it extends remains extensible without commercial-licence friction; and long-term governance optionality — donation to an independent foundation (Linux Foundation Climate, OpenSSF, or a CBAM-focused body once the ecosystem reaches sufficient maturity) — is preserved in the architecture.
The company
Verusum Ltd is the United Kingdom company sponsoring this work. The vsmcodex specification, the methodology engine, Verusum Verify, and Verusum Report are all under sponsorship of the company.
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