Both Dash and Lily were registered with Avid, as were my earlier dogs. When I adopted Molly, she was already chipped and registered with Home Again, and the transfer was free, so I kept it. Recently, I had Shadow chipped by my vet. He uses a third chip registry, PetLink, and the registration was part of his fee, so now I have 3 dogs, all registered with different companies. Of course, I could register all 3 of them, for extra fees, at one of the 3, if I could figure out which one. Good luck with Bella's chip.
I used the AAHA site to check on the 3 dogs. They had Shadow and Molly there, but not Lily (the Avid dog). Curiously, Avid is the one registry that does not let you log on and manage the dog's profile (as well as your own). That's odd because I got brass ID tags from them years ago for both Dash and Lily. I think the problem is with their database.