Is it possible to &quot;fix&quot; copyright infringement by deleting the &quot;infringing&quot; part? Two Live Crew was sued by the holders of Roy Orbison's copyright for their version of "Pretty Woman." Titles are not copyrightable, so the basis for this suit was the copied first line: "Pretty woman walking down the street." (The rest of the two songs were very different.) "Crew" had a "parody" defense for using the first line. But suppose they didn't. Could they fix the problem by e.g. changing the infringing first line to something like "Pretty woman running through the park?"
There's existing copyright infringement and future copyright infringement. Let's say you sold a million records with infringing contents. That's copyright infringement. It has happened, you can't undo it. Now you get sued. If you think you will lose, it would be a good idea to change the music to be not infringing, so the next million records are not infringing and add to the damages. It doesn't fix the infringement that has already been done, but makes sure there is no further infringement. And infringement after you were told about it and asked to stop might be punished more harshly.
There are a number of existing legal sites that do this, for free or for pay. The main concern for a website operator pertains to the DMCA "safe harbor" provisions, which protect against vicarious liability for infringement. A "report piracy" option is not sufficient; see this answer to a related question.
I'm not a lawyer; I'm not your lawyer. I would interpret the Copyright Board's interpretation in relation to tariffs when musical works copied for private use only, as the document's scope does not appear to extend beyond that. However, in BMG Canada Inc. v. John Doe, [2004] 3 FCR 241, a consortium of record industry corporations attempted to request confidential ISP account holder information. Essentially, the plaintiffs failed to bring adequate evidence to prove the magnitude of copyright infringement; additionally, it is specifically stated at [24-5] that: Subsection 80(1) [as am. by S.C. 1997, c. 24, s.50] of the Copyright Act provides as follows: 80. (1) Subject to subsection (2), the act of reproducing all or any substantial part of (a) a musical work embodied in a sound recording, ... onto an audio recording medium for the private use of the person who makes the copy does not constitute an infringement of the copyright in the musical work, the performer's performance, or the sound recording. Although the Copyright Modernization Act, did, in fact, introduce a number of amendments, Subsection 80 still reads as it does when the BMG case was decided. Since this case, I can find no court that has found this ruling to be invalid, and no cases which have considered and not applied this subsection. There is also Subsection 29.22 (1) (which applies to all works): 29.22 (1) It is not an infringement of copyright for an individual to reproduce a work or other subject-matter or any substantial part of a work or other subject-matter if (a) the copy of the work or other subject-matter from which the reproduction is made is not an infringing copy; (b) the individual legally obtained the copy of the work or other subject-matter from which the reproduction is made, other than by borrowing it or renting it, and owns or is authorized to use the medium or device on which it is reproduced; (c) the individual, in order to make the reproduction, did not circumvent, as defined in section 41, a technological protection measure, as defined in that section, or cause one to be circumvented; (d) the individual does not give the reproduction away; and (e) the reproduction is used only for the individual’s private purposes. Subsection 80(1) creates a special exemption purely for musical works, and so the less restrictive conditions there should be found to apply to them instead. On the basis of the case above, and my consideration of the Copyright Act, I would find that reproduction of a musical work does not constitute copyright infringement, pursuant and subject to s 80(1) of the Act.
By &quot;buying the song&quot; on Gumroad you don't actually buy the song, you buy the right to do specific things with that song. I couldn't find the exact license terms, but for 800 Yen (about $6) for a whole album I highly doubt that this will include much more than the right to listen to the song on a private device. The rights to publicly perform, reproduce, redistribute, use commercially etc. usually cost a lot more. So if you want the rights to use the song in your own video, you will have to negotiate the purchase of a license which allows you to do that with the creator. Or if they reassigned their copyrights to a music label or copyright collective (which some music artists do), with that organization. There are some exceptions in the copyright laws of some countries where you can use parts of a song without a license. For example, the &quot;fair use&quot; exception in US copyright law if you review, discuss or analyze a song. But such exceptions usually don't apply if you use the song as background music, adapt the song into an own work or even just reupload the song on your own channel.
In general, using content provided by another who incorrectly posted it under a permissive license, such as a CC license, does not grant a valid license from the real copyright holder. That is, if A writes some code (or a song, or creates an image, or whatever else), it is protected by copyright. If B then posts it to the web, with a statement that it is released under a particular license, without having obtained permission from A, then B's &quot;release&quot; is of no value, because B had no rights to grant. If C downloads and uses this content, relying on B's license, then A could take legal action against C. C would probably be considered (in the US) an &quot;innocent infringer&quot; which reduces the minimum statutory damage amount, but does not otherwise change C's legal position. A could, if it chose, bring suit and possibly obtain a judgement including some damages. But to return to the practical case of code posted on one of the SE sites. Given the comparatively short code sections usually posted, and that they do not usually form a complete working program, and given further the stated educational purpose of SE, it is likely that in US law such a posting would constitute fair use, and in the law of other countries fall under one or another exception to copyright. That is a general conclusion, the details would matter. I have not heard of a case similar to that suggested in the question. I find it unlikely that an SE poster would post copyright-protected code without permission, that is valuable enough to be worth an infringement suit, and substantial enough and having enough effect on th market for the original to be outside the protection of fair use. Such a situatiion is, of course, possible, even if unlikely. Note that a cease-and-desist letter is not a court order, and is really only a threat of court action. its only legal effect is to put the recipient on notice, so that continued infringement is not without awareness of the copyright claim. To have legal effect the claimant must actually bring an infringement suit, which is not without cost.
No Copyright protects expressions of ideas but not ideas. A song with the words if a poem set to music would generally require the permission of the owner of the copyrighted poem. An instrumental score “inspired by a poem” would not remotely be using the same expression, or a derivative of, the poem. Titles are not subject to copyright and there are many books with identical titles. Try “The Gathering Storm” as a book title.
You probably own the copyright, since this wasn't an explicit part of your job. However, there may be other legal reasons which preclude you from using them anyway; copyright isn't all there is. Since you are in the middle of an active dispute, you should consult an actual lawyer (which I am certainly not) for legal advice.
Whether the use of excerpts from songs protected by copyright in the cover version of a different song is a &quot;fair use&quot; under US law is always a fact-driven question, and often there is no clear answer to fair use issues short of a lawsuit. One must remember that fair use is a specifically united-states legal concept, and that reproduction of such a cover version outside the US would not be protected by fair use, even if it was fair use under US law. Fair use is defined by 17 USC 107. That law spells out the four factors that must always be considered in any fair use claim. They are: (1) the purpose and character of the use, including whether such use is of a commercial nature or is for nonprofit educational purposes; (2) the nature of the copyrighted work; (3) the amount and substantiality of the portion used in relation to the copyrighted work as a whole; and (4) the effect of the use upon the potential market for or value of the copyrighted work. These have been explained and analyzed in several answers here on law.se, recently including this answer. In this case the commercial nature of the compilation probably causes factor (1) to lean against fair use. The creative character of the songs being used will cause factor (2) to lean slightly against fair use. That the use is for a charitable purpose might have a positive effect on factor (1), although it does not fit the &quot;educational&quot; purpose specifically mentioned in the law. I don't see how this would be in any way relevant to the other three factors, but it might influence the decisions of copyright owners. There is not enough information in the question to even approximate an analysis of the other two factors in this case. Note that the &quot;substantiality&quot; mentioned in factor (2) refers to how much of the source work is used, not how large a part of the resulting work it forms. Note also that there is a wide range of what has been acceptable here. In one famous case (Harper v Nation Enterprises) some 300 words of a 500 page book were found not to be fair use because they were held to be the &quot;heart of the work&quot;; in that case there was also a substantial market effect. One might want to consult a lawyer with expertise in copyright and music to get a better idea if the specific use seems likely to be a fair use. Alternatively, one could ask the copyright owners of the works of which excerpts are to be included if a license can be obtained. Some owners will in some cases provide licenses for a small fee or even for no fee if the source is properly acknowledged. Others will not. Licensing of one song by a given artist does not affect whether use of another song by the same artist is or is not fair use, but it might influence the willingness of that artist to license the second song on favorable terms.