I can't find anything definitive in either the Flickr group or on the website/blog. Is there a general consensus (or at least a fairly reliable source) on the current exact recommended procedure for "bulk-registering" image copyrights? For example, registering four times per year as groups of "published" images, to ensure full protection and the ability to seek statutory damages for infringement? I've searched the Flickr group but have found lots of conflicting information and vague descriptions of the exact "how" of the process.
Some people seem to say that you throw low-res JPEGs into folders based on the date they were "published" (which, to me, seems to be the date I made them available to my client for download) and then compile them all into a ZIP file to upload to the US Copyright Office website. The last registration I did, which was accepted by the US copyright office, was for a single notable property where I created a PDF with medium-resolution images, one per page with no margins. I just uploaded the PDF as part of the upload deposit. Is there a current "validated" workflow for high-volume content creators such as real estate photographers?
I've also seen a Lightroom plugin called ImageRights which, for a fee, seems to allow you to track registration status and group images together in a compliant way. Have you heard success stories of people who feel it's worth the additional expense to use this for registration?
I think for anyone that wants to be diligent about copyright Christopher Reed's book, Copyright Workflow for Photographers: Protecting, Managing, and Sharing Digital Images is the best place to start. This book covers all aspects of the copyright registration process from planning, online registration, and monitoring and enforcement. And since Christopher is a lawyer and photographer the workflow Christopher describes is authoritative and verified. A summary of the book is on artlawjournal.com.