Are the title and author of a song protected by copyright? I am developing a platform where users can search songs by BPM and Key. The only thing that came to my mind is: can I show songs' titles and authors after the user does a search, without violating the copyright of the song and its author? The platform is a commercial project, so I'm earning money through users' monthly subscriptions to the website. I am not earning money from the songs themselves, since I'm showing just the title, author, BPM, and key of the song, without letting the user reproduce it or listen to it in any way. I know songs' titles do not have copyright, but does the combination of song title + author have it?
Facts cannot be copyrighted. Such a project does not violate copyright law, and if you're in the United States, it is protected by the First Amendment.
Musical compositions can be, and if recent almost always are, protected by copyright. This is separate from the copyright on a recording of a performance of the work. If you reuse a musical passage, the new work may be a derivative work, that is a work based on an earlier work. Or an extended musical quotation could be considered to be copyright infringement. If this is in the united-states the use of a section from a previous work might be considered to be a fair use (fair-use). This is a specifically US concept in copyright law, although several other countries have a concept of fair dealing which is somewhat similar, although narrower. Whether a use is a fair use is an inherently fact-based determination. There is no clear and simple bright line for what is and is not a fair use. US law (17 USC 197) specifies four factors which are to be weighed by a court in considering the matter: The purpose and character of the use. If your use is commercial that weighs against fair use, but does not at all preclude it. This factor also includes whether the use is transformative or not. A transformative use is one that takes the part used for a very different sort of purpose than the original. Parodies are normally transformative, for example. A quote for purposes of commentary and analysis, or criticism is normally transformative. Transformative uses are more likely to be considered fair uses. The nature of the copyrighted work. Creative works such as fiction and music are more strongly protected than works such as textbooks and news stories. This probably weighs against fair use in the case described. The amount and substantiality of the portion used in relation to the copyrighted work as a whole. If only a short section of a longer work is used, that weighs in favor of fair use. However very short quotes can still fail, to be held to be fair uses. In Harper vs Nation a quote of about 300 words from a 500 page book was held not to be fair use because it was &quot;the heart of the book&quot;. The effect of the use upon the potential market for or value of the copyrighted work. A use that significantly harms the market value of the original, or serves as a replacement for it, weigh strongly against fair use. This was a major factor in Harper vs Nation. Each case of claimed fair use is evaluated by looking at all four factors, and the specific facts of the case. From the description in the question, such a use might well be held to be fair use. Musical quotations often are. But there is no way to be sure unless a court evaluates the specific case. A lawyer specifically experienced in not only copyright law, but copyrights on music, might be able to give more specific advice. Or you could, of course, seek permission from the copyright holder, quite likely the original composer or artist. If you get permission, there is no further issue. There might be a charge, but when the use is minor, and has no commercial effect, the charge might be small or even zero provided that the source is acknowledged.
In the US, the author would be able to wind an infringement lawsuit against the re-publisher. Title 17, the US copyright law codified, grants the author the exclusive right to authorize republication, and does not require that a person use their real name. The argument "It was on the internet, it's in the public domain" is utterly without legal merit. The same goes for the assertion that a person loses his rights if he is uncontactable. The author has stated the terms of the license, so there isn't even a reasonable argument that the infringement is innocent (unknowing: "I thought it was with permission). There is no requirement that you have to allow a potential user to hassle you about the license terms. The one thing that is special regarding anonymous and pseudonymous works is that under 17 USC 302, "copyright endures for a term of 95 years from the year of its first publication, or a term of 120 years from the year of its creation, whichever expires first". For a work whose author is identified, copyright "endures for a term consisting of the life of the author and 70 years after the author’s death". This assumes that the host site has not preempted author's license: Stack Exchange, for example, preempts an author's exclusive right, so you can copy stuff from here accorting to the SE terms of usage.
No, it's still copyright infringement. When you modify a copyrighted work in any way, you generate a derivative work which you are not allowed to distribute without the permission of the original copyright holder.
No, copyright absolutely does not protect anything "novel" or anything related to algorithms or generally anything functional at all. Copyright only protects your "expressed representation of a creative work". Other people can duplicate your work with a different "expression" and not be infringing on copyright. And if there is nothing creative in your work then it's not even eligible for copyright in the first place. For example, if you figure out how to sort an array with fewer computational steps than what anybody else is doing then that is functional code, not creative code, and anybody can reverse engineer/duplicate your sorting algorithm. However, patents do provide the protection you're looking for. If you want to protect your fancy algorithm then apply for a patent. Patents expire an order of magnitude sooner than copyright, but they are the only means of legally protecting this type of intellectual property. Unlike copyright, patent protection is only available if you apply for it, and it has to be approved by the relevant government department in your country (although you can start using the patented technology before approval has gone through).
It is not possible to say that this is generally fair use, although sometimes it would be. A copy for personal use is still a copyright right violation on its face, and fair use does not categorically exclude non-commercial or personal use of copyrighted works. It is a highly fact specific inquiry. The likelihood of anyone discovering that you have done so and deciding to sue over it is slight, but that doesn't mean that there isn't potential copyright infringement liability. Compare this to speeding. People do it all the time, and even driving one mile per hour above the speed limit is still a traffic violation. But it is rare for less serious violations to be ticketed.
Copyright protection exists for any work (picture, paragraph, song etc), and persists for many years until it expires. Unless the work was created a long time ago, or was created by the US government (not the same as &quot;funded by government money&quot;), you should assume that the work is protected. That means that you must have permission to copy it. Sometimes, a work has associated with it some such permission, in the form of a &quot;license&quot;. Without such a license, you have to request the copyright owner for permission to copy – whether or not they say that the work is protected by copyright (because by law it is protected, so they don't have to say that it is). If you request permission to copy, and do not receive the required permission, then you cannot legally copy the work. The copyright holder has no obligation to explicitly deny permission. You can certainly list the URL for an image, you just cannot copy the image in your book.
You probably can. There are a few questions here. First, is the message protected by copyright? In general, it probably is, but there are many exceptions that might allow you to use it without permission. Unfortunately, these exceptions vary from jurisdiction to jurisdiction. The exceptions tend to allow the use of small excerpts of a work for various sorts of purposes that don't undermine the copyright holder's ability to profit. That leads to the second question, which is why you are using that message. If you're including it in your source code so you can test whether a message generated at run time is in fact that message, that's one thing, and it's probably okay. On the other hand, if the owner of the copyright sells a database of all its message strings, and you're compiling a similar database that you also intend to sell, that's probably not okay. A third question concerns the Firefox license terms. It's entirely possible that they allow you explicitly to do what you're considering, in which case it doesn't matter what copyright law says about it. On the other hand, Firefox is open source software, and under some open source licenses, if you incorporate any of the source code in your own product, you are required to release your product's source code under the same license. If you're not already planning to do that, you should consider carefully whether including that error message would trigger that provision (if there is one) of Firefox's open source license.