Usually you have to be the author of a work to receive copyright protection. Rights can be transferred, but this is generally done in writing, and you'd probably know if rights had been transferred to you.
Because the term of protection is usually measured by the life of the author rather than the copyright date of the item, it may seem that the copyright year is unimportant. However it gives an excellent indication of the currency of the materials, and does form the base line for measuring term of protection on certain works.
Generally, the text on a bumper sticker would be too short to qualify for copyright protection.
For the most part, you can assume that a given text or image is protected by copyright unless explicitly stated otherwise. Protection is automatic, and the term of protection is quite long. The real challenge is in finding out who the copyright belongs to.
Because copyright protection is immediate and automatic, your best bet is to assume a work is protected unless you can prove otherwise.
I Know Why the Caged Bird Sings is currently still under copyright. Under current US copyright law, the 1969 book is a protected work. If Ms. Angelou were to die today, I Know Why the Caged Bird Sings would not enter the public domain until midnight the end of the calendar year, 70 years past the death of the author.
Copyright protection is required in the US Constitution (among other documents) to be for a limited time, so protection must expire.The laws have changed many times over the past 200 years, so you would need to know when a particular work was published before you can figure out when its copyright would expire, and whether other factors are involved (type of work, nationality of author, copyright notice and renewal, etc).You should also know that some works have no copyright at all and never did.
Very quietly and without advertising it, or your intentions of doing it, on a public message board. You do know that is against the law and you can be arrested for copyright infringement, right?
Because notification is not required for protection, it is safe to assume that any mp3 is protected by copyright unless explicitly stated otherwise.
The most important factor in establishing if copyright protection exists it the date of creation/publication. In most cases anything published before 1923 is in the public domain. After that date you will need to do a bit of research to determine if a work is protected or not.
Typically it will be printed on/in the materials, often where the copyright notice would normally appear.
Visual artists should be aware of copyright laws to protect their original works. Key considerations include understanding what can be copyrighted, how to register their work, and how to enforce their rights against infringement. It is important for artists to know the duration of copyright protection, how to license their work, and how to avoid infringing on the rights of others.
"To Kill a Mockingbird" by Harper Lee is not in the public domain. The novel was published in 1960, so its copyright will expire 70 years after the author's death, which occurred in 2016. Therefore, the book will enter the public domain in 2086, assuming no changes to copyright laws.