As a content user, only use materials you create yourself, things in the public domain, or things for which you have a license from the copyright holder.
As a content creator, clearly mark your materials (especially in the metadata of digital files), register your works with the copyright office, ensure professional associations have up-to-date contact information for you, and be vigilant about uses of your works.
for your sentence time in jail for breaking the copyright law, you may get 89 years!
Yes. It would be breaking the law to do otherwise.
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Yes, you're breaking a copyright law.
Only use materials for which you are the creator, or for which you have an exemption in the law or permission from the copyright holder.
No songs have ever been sued.
In the US, it is punishable by fines up to $30,000 per infringement.
Violating copyright law and defending your rights are opposite ideas. The legal impact of breaking copyright law varies from country to country, but usually consists of fines, and in extreme cases, prison sentences. The legal impact of defending your rights as a creator is you retain those rights, and may collect damages.
Only use materials in the public domain, for which you are the copyright holder, or for which you have permission from the copyright holder or an exemption in the law.
Not at all. Musica reservata was a particular style of a cappella music intended for small, limited audiences. Copyright infringement is a violation of federal law.
Included in the copyright law is the notion of "fair use," which allows certain specific unlicensed uses such as this. See the link below for a good discussion of copyright and fair use in the classroom.
Rarely; rightsholders are more likely to demand remuneration from the parents.