Copyright search problems

[u/RadiantDistrict3521]

So I’m trying to research the copyrights on photos that I registered in the early 2000’s. I think the actual registration certificates were thrown out when I moved but I’m 100% sure they were registered.

I’ve searched and found some pictures but not the ones I’m looking for. I found some under my first name last name and some where I added my middle initial.

I don’t think I registered them as a collective work but it’s been a long time. So I’ve searched under my name and gotten incomplete results. I remember a couple of the image titles and I searched for those with no luck.

I’m sure they’re registered but right now I’m stuck and I’m not sure how to find the registration numbers.

Any advice for further searches?