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CSOAI

Independent measurement body. Signed attestation and transparent measurement — never certification.

Product

  • Verify a card
  • Request attestation
  • Board
  • Tools — plugin snippet
  • Ask about a measured run
  • Ledger
  • Data
  • Library

For machines

  • Board JSON — /api/gspc
  • Tool surface — /mcp
  • Agent card
  • Metered doors + free previews
  • Our public keys
  • Signed evidence root
  • OpenAPI description

Evidence

  • GSPC JSON
  • Evidence files (cards, proofs)
  • Methodology
  • Honesty gate
  • Corrections
  • How far this reaches
  • llms.txt
  • API docs

Company

  • About
  • Independence and conflicts
  • Contact
  • Where we take part
  • Blog
  • FAQ
  • Careers

Legal

  • Disclaimers
  • Privacy
  • Terms
  • GDPR / DPA

Reference frameworks

  • EU AI Act· Regulation (EU) 2024/1689
  • NIST AI RMF· reference framework (no crosswalk measured)
  • ISO/IEC 42001· reference framework (no crosswalk measured)
  • DORA· reference framework (no crosswalk measured)

Bodies we take part in

  • C2PA· contributor
  • Open Invention Network· member
  • LOT Network· member
  • Decentralized Identity Foundation· did:web trust root

Naming a framework is not a claim to comply with it, and taking part in a body is not that body endorsing us. We are not certified to SOC 2 or ISO 42001, and we hold no certification under any scheme. We publish measurements, never certifications. Every participation record, with its evidence.

Verify us everywhere

  • Hugging Face · source snapshot
  • Hugging Face · csoai
  • PyPI · inspect-signed-receipt
  • PyPI · csoai
  • PyPI · proofof-ai-mcp
  • Zenodo DOI 10.5281/zenodo.21991104
  • Wikidata · Q141128616
  • Companies House · 16939677
  • ORCID 0009-0001-3869-1068
  • Software Heritage · archived
  • Sigstore Rekor · root witnessed
  • did:web trust root

Each link resolves to a public record or independently hosted verification surface.

Verification is free. Paid step: the x402 catalog — commission_card / art50 / rwa / evidence-bundle / the signed feed door. GET /api/x402

Every stage of how far this work travels is measured separately and never added together. All seven stages, including the ones we cannot measure yet

  • Member·Open Secure AI Alliance (a Linux Foundation project)
  • Member·C2PA (Coalition for Content Provenance and Authenticity, a Linux Foundation project)
  • Member (Contributor)·Decentralized Identity Foundation

Where we take part → Standards bodies: W3C AI KR CG, W3C Agent Conformance CG, W3C Agent Identity CG, IETF Internet-Draft, IETF scitt list, IETF agentproto list, IETF audit list, C2PA, DIF, OSAIA, BSI ART/1 comments · Registries & indexes: mcpservers.org, MCP Registry, PayAI discovery, Hugging Face, PyPI, npm, OpenSSF Best Practices, Software Heritage, Smithery · Scholarly identifiers: ORCID, Zenodo DOI, OpenAIRE, Wikidata, ROR request (pending) · Regulatory filings: NIST AI 200-2 comment, NIST AI 300-1 comment, NIST SP 800-239 comment, Bank of England response, US Treasury docket (pending) · Policy programmes: EU AI Pact · Open-source commons: Open Invention Network, LOT Network

Participation is not endorsement, and a listing is not adoption. Every entry links to its evidence.

  • Our decentralised identifier
  • Security contact
  • llms.txt
  • Companies House 16939677
  • Corrections ledger

© 2026 CSOAI Ltd · Registered in England & Wales No. 16939677 · 3rd Floor, 86–90 Paul Street, London EC2A 4NE · contact@csoai.org

To object to, dispute or request a correction of anything we publish: /dispute or contact@csoai.org. Corrections are dated in the ledger.

Independent. No financial ties to OpenAI, Anthropic, Google, Microsoft, Meta, or any AI vendor.

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Navigated to Framework guide: UK AI Bill — withdrawn | Council of AI