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  1. U.S. Copyright Office

  2. Licensing Overview | U.S. Copyright Office

  3. What Is a Copyright License? | LegalZoom

  4. Register Your Work: Registration Portal | U.S. Copyright Office

  5. About CC Licenses - Creative Commons

  6. Copyright Licensing Under the Law | Intellectual Property Law …

  7. How to Get a Copyright License | LegalMatch

  8. Copyright Licenses and Assignments (BitLaw)

  9. Trademark, patent, or copyright | USPTO

  10. Copyright - Wikipedia