From the European Commission:
As more and more content is being produced and available online, there is an increasing need to identify and track this content. Audiovisual standard identifiers (ID) provide the solution to simplify rights management and digital distribution, and to facilitate content exchange and discoverability for professionals and fans alike.
Audiovisual standard IDs benefit the audiovisual industry and provide a common language that allows the easy identification of content globally, not only within an organisation or country.
The European Commission, in the framework of its Audiovisual Standard ID promotion policy, has identified the International Standard Audiovisual Number (ISAN) and the Entertainment ID Registry (EIDR) as important players to help producers, distributors, broadcasters and online service providers automate workflows, cut distribution and rights management costs, and expand the benefits of digital distribution.
If each of the two systems has this impact, interoperable identifiers further increase the benefits allowing ID users to work with either organisation while enjoying the benefits of both.
EIDR and ISAN-IA announced that the joint dual registration service went live on 16 April 2019.