Tablature sites are supposed to get copyright permission and licensing from the songwriter / publisher. Many have been threatened with lawsuits. Many are now working out deals for licensing with the publishers. Claiming Fair Use for educational purposes is tricky. Your best bet is to contact the publishers directly and get it in writing that they agree your use is Fair Use, or to license it to you. Most major publishers are online and take requests through a website form. The fact that you do not charge money or have ads is not a real defense in Copyright actions. You can also wait and see what happens, knowing the risks. It is a good idea to make your contact email very clear and available on the website so that anyone claiming Copyright infringement can contact you easily and you can take down the offending material. Also keep in mind that you can use any songs that are in the public domain and do not have have to worry about Copyright on those.
Answered on May 16th, 2012 at 2:49 PM