Can a Transcription have a Copyright? There is a transcription of a song https://www.youtube.com/watch?v=IfcS-w808dM that I put in a video. Youtube obviously noted me that it is copyrighted and told me that it might put ads in my video. Can transcriptions actually have a copyright as they are not original compositions? If not, would I still need to get permission from the original author?
A transcription can be a creative work, so it can be protected by copyright (no commitment about that particular instance). A transcription is copying and transforming an original work in a particular (symbolic). The original work that the transcription is based on is also protected by copyright, so to make the copy that embodies the transcription, you need permission from the original rights holder. Splicing the transcription onto an illegal copy of an original performance is also copyright infringement, but resynthesis based on the transcription is not. A transcription also might not be entitled to copyright protection, if it is the product of a computer program, since feeding a sound file into a program is not a creative activity. (The program that generated the transcription is, of course, protected by copyright).
Do you have an explicit permission by the artist? Does the artist give a blanket permission to anyone which covers this kind of use of their work (a license)? If no, then you commit a copyright violation when you use their work for your blog. This applies to practically any country which signed the Berne convention which is almost everywhere in the world. Having no commercial interest is usually not an excuse to violate copyright. Regarding which jurisdiction applies when you, your website and the copyright holder are in different countries: I opened a new question about this.
Copyright exists from the moment of creation of the work Copyright notices and dates are neither required nor meaningful. They are a courtesy to others. They can also have typos.
I'm not a lawyer, but under the law as it's written, I see two problems: 17 USC 121 allows "authorized entities" to make and publish accessible copies of works. An "authorized entity" is defined as a nonprofit organization or a governmental agency that has a primary mission to provide specialized services relating to training, education, or adaptive reading or information access needs of blind or other persons with disabilities. So if you, as a private citizen, decide to do this, it could conceivably be copyright infringement. You might have to set up some kind of non-profit organization to make it legal. It's also OK (I think) if you make such copies for your own personal use, so long as you don't redistribute them. So far as I can tell, nothing under 17 USC 121 requires the original publisher to provide an "authorized entity" with a copy in any particular format (PDF, paper, or otherwise) for making accessible copies. Basically, the law seems to have envisioned organizations of sighted people purchasing paper copies, transcribing them, and republishing them; not blind individuals doing electronic transcription for themselves. It might still be worth contacting Hal Leonard and asking what they can do for you, but unfortunately it doesn't look like the law requires them to do anything for you. As Nij points out in the comments, this really seems to be a question about the company's policy, rather than the law.
No. Copyright protects expressions of ideas, not ideas themselves and not historical facts either. Conceivably, the persons written about might have a commercial right to use of their person or image, but the doctrine there is not copyright and the analysis is different.
As stated in the answer to What is considered &quot;public&quot; in the context of taking videos or audio recordings?; if either of the participants is in Australia than unless all parties have given consent then the recording is illegal. Notwithstanding its legality, property in the recording vests in the person who made it. There is no law against him keeping it. There is no law against him publishing it unless the material contained is offensive, hate speech or defamatory (see Customer feedback gathering in Australia).
You automatically have copyright protection for what you create. A collection of numeric answers to math equations probably would not qualify (lack of requisite creativity), but certainly anything that counts as a "paper" is protected.
Copyright expires 70 years after the original writer breaths his/her last breath, after that it becomes public domain. And all works published before 1923 are in the public domain in the US. This means that the inheritors of the rights cannot sue you for infringement because there is nothing to infringe. If the music is not in public domain you will need to contact the rights holders and negotiate the rights to use the music. This can also be a company that has the right to sublicense the content to others. This is often the way radios and DJs get the right for the music they play.