Европейский проект Доступных регистров правовой информации и работ-сирот
Developed by a European consortium coordinated by the Italian Publishers Association (AIE), ARROW — Accessible Registries of Rights Information and Orphan Works — is a system to help libraries with the identification of rights status and rightsholders in digital library programs. ARROW is based on a pro-active search of rightsholders for works eligible for inclusion in any digitization program, and indirectly is a tool for the identification of so-called “orphan works.
Регистр без решения вопроса с «сиротами» смысла большого не имеет, если только не использовать его для форсирования регистрации.