Retrieve beneficial ownership data from the Netherlands KVK (Kamer van Koophandel) API for a Dutch entity

Steps

1. Register for a KVK API key at https://developers.kvk.nl and confirm access to the Handelsregister (Business Register) and UBO Register APIs
2. GET https://api.kvk.nl/api/v1/zoeken?handelsnaam={name}&type=RECHTSPERSOON to search by company name; parse resultaten[].kvkNummer for the company registration number
3. GET https://api.kvk.nl/api/v1/basisprofielen/{kvkNummer} to retrieve the full company profile including registered address, SBI activity codes, and date of incorporation
4. For UBO data, use the UBO Register API endpoint (requires elevated access tier for AML-obliged entities): GET https://api.kvk.nl/api/v1/ubo/{kvkNummer} to retrieve beneficial owners with name, nationality, and ownership category
5. Parse ubo[].persoonsgegevens for name and birth details and ubo[].aard_belang for nature of control (e.g., 'aandeelhouder', 'stemrecht')
6. Store kvkNummer as the persistent entity identifier for future updates and change monitoring