ASPP “Best Practice” Guideline
The American Society of Picture Professionals has documented guidelines entitled “ASPP’s Best Practices for Locating Copyright Owners of Photographic and Visual Art.”
This guide is intended to be a “living document” and will be updated on a continual basis as new registries and technologies become available.
The guide can be found at the ASPP website at
http://www.aspp.com/pages/257/189/0/