Customer due diligence risk checks powered by the Legal Entity Identifier (LEI), open data and open standards - including the Beneficial Ownership Data Standard (BODS).
Try the demo at https://opencheck.world/
You paste in a Legal Entity Identifier. OpenCheck queries GLEIF first, derives every cross-source identifier it can (UK Companies House number, Norwegian organisation number, Irish company registration number, Finnish Y-tunnus, Latvian registration number, Lithuanian entity code, Estonian registry code, Czech IČO, Polish KRS number, Austrian Firmenbuchnummer, Slovak IČO, French SIREN, Dutch KvK number, Swedish organisation number, Swiss UID, Canadian corporation number, Belgian enterprise number, Danish CVR number, Croatian MBS, Maltese registration number, Brazilian CNPJ, New Zealand company number, Australian ACN/ABN, OpenCorporates ID, Wikidata Q-ID, and more), and uses those bridges to fan out across 34 national and international corporate data sources.
Everything maps into BODS v0.4. Cross-source links and risk signals are computed deterministically, and the whole bundle is one click away from a downloadable export (JSON / JSONL / XML / ZIP, plus Senzing JSON entity records for entity resolution).
The risk-signal layer mirrors the EU AMLA draft customer due diligence regulatory technical standards conditions for "complex corporate structures" — trust/arrangement, non-EU jurisdiction, nominee, ≥3 ownership layers, plus the composite threshold rule and an advisory mirror of the subjective obfuscation condition.
Latest: Phase 72 — Shareable social cards: live entity summaries in link previews
Sharing an OpenCheck lookup now produces a link whose preview is a live summary card for the entity — name, risk-signal count and the first three signal flags in OpenCheck's risk colours — instead of the generic brand image. Cards render server-side with Pillow at GET /og/{lei}.png from the same pipeline results the page shows, with a teaser variant when no recent lookup is cached. Social crawlers don't execute JavaScript, so a new crawler-readable GET /share/{lei} page carries the per-entity Open Graph/Twitter tags and instantly redirects humans to the app; the subject card's new "Copy share link" button hands out that URL.
Previous: Phase 71 — Wikirate: open ESG metric answers
The backend ships with cache-first dispatch: in stub mode (no API keys, no OPENCHECK_ALLOW_LIVE) every adapter returns deterministic placeholder data. Live mode is opt-in per source via env vars.
cp .env.example .env
docker compose up --build- Frontend: http://localhost:5173
- Backend: http://localhost:8000 (OpenAPI docs at
/docs)
Backend:
cd backend
uv sync
uv run uvicorn opencheck.app:app --reload --port 8000Frontend:
cd frontend
npm install
npm run devThe BOVS icons and country-flag SVGs are committed under frontend/public/, so the dev server needs no extra build step.
| Page | Contents |
|---|---|
| How it works | Step-by-step lookup flow, per-adapter detail, Open Ownership BODS bundles, API surface, project structure |
| Sources | Full adapter table — active sources plus inactive bulk-only adapters, license, entry point, description |
| Risk signals | All signal codes: source-derived, AMLA CDD RTS, FATF jurisdiction, state-controlled/SOE, cross-source name match, ICIJ Offshore Leaks |
| Subsidiary network | Lazy GLEIF Level-2 reveal — direct + ultimate children mapped to BODS, graph (small) or table + export (large) |
| Configuration | Environment variables, Render deployment, running the test suite |
| Development history | All phases |
OpenCheck's own code is MIT-licensed. Data retrieved from third-party sources is licensed under each source's own terms — see ATTRIBUTIONS.md. Downloaded exports include a LICENSES.md listing every source that contributed data, with re-use guidance for the most-restrictive licence in the bundle.
The frontend renders ownership graphs with Cytoscape.js (MIT). It re-uses the Beneficial Ownership Visualisation System design tokens (CC BY 4.0) and the BOVS entity/person icons and country-flag SVGs from Open Ownership's visualisation library (Apache 2.0) — both © Open Ownership. The committed assets live under frontend/public/bods-dagre-images/, a directory name retained from their original source.
- Live opentender.eu integration — the adapter is wired but
live_available=Falsefor now. - A "complex offshore" demo subject that fires every AMLA chip simultaneously.
- BODS RDF / SPARQL backbone via Oxigraph — load the assembled BODS bundle into a triple store, expose
/sparqlfor the published Open Ownership red-flag queries.
Open issues and discussion live in the GitHub repo.
- Beneficial Ownership Data Standard (BODS)
- BODS RDF vocabulary 0.4 — the
risk.pyrules are designed to be portable to a SPARQL/Oxigraph backbone. - GODIN — Global Open Data Integration Network — the LEI-as-connector vision OpenCheck is built around.
- AMLA draft CDD RTS public consultation.
- Open Ownership red flags in BODS data and risk-detection across BO + procurement + sanctions.