I'm thinking about open sourcing a project of mine. I'd accept contributions under a CLA that grants me a copyright license (I'll explain what I mean at the end of this question). — Now, if someone submits a contribution, is it then okay that I write
Copyright (c) 2013 My-Name at the top of each file? And mention any contributors in a separate document only, and refer people to the Git commit log and to GitHub statistics if they want details on individual contributors?
I think this should be fine with
Copyright (c) My-Name, since I've been granted a copyright license?
If it's not okay, then I suppose the copyright-info-preamble of each source code file would have to include the name of all contributors to that file? Which doesn't seem practical (if there are very many contributors).
Here I'll try to explain what I mean with a "a CLA that grants me a copyright license". This is an edited excerpt from a CLA by Google:
.2. [...] You [that is, the contributor] hereby grant to [My-Name, that is, me] and to recipients of software distributed by [My-Name] a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Your Contributions and such derivative works.