U.S. Song Copyright Registration

I have a collection of 6-15 original songs and I want each of them properly registered with the U.S. Copyright Office. The works are currently gathered in books format, so your approach will need to accommodate that structure when preparing the deposits. What I need from you is straightforward: guide me through (or fully handle) every filing step inside the eCO portal, make sure the titles and author details are entered correctly, upload the required book-formatted deposits, and return clear confirmation numbers for every song once the Office accepts them. If any supporting documents or split sheets are missing, flag those early so we can keep the timeline tight. Experience completing U.S. musical work registrations is essential; please outline past filings you have done and let me know how you prefer to receive the source files. Turnaround time and accuracy matter more to me than speed alone, so build that into your proposal.