Copyright is automatic and grants full protection from the moment of creation.
Registering copyright isn't necessary, it is helpful though in resolving certain disputes. Registration also does not require you to disclose the work to everyone, it requires you to deposit the work with the copyright office, which will pull it out if some court case requires it.
Registering copyright isn't necessary, it is helpful though in resolving certain disputes. Registration also does not require you to disclose the work to everyone, it requires you to deposit the work with the copyright office, which will pull it out if some court case requires it.