I believe in images as proof when it is available. I am not a lawyer. However, for the newspapers, if you get it off microfilm yourself they usually say 70 yrs or 1922. I studied ancestry's copyright info (and others) and none of them can be explained without a lawyer and we can't be asking lawyers for answers - and the internet providers know we wont.. There are some guidelines to copyright abuse, like (if you copy less than 1% of something it is considered minimal and acceptable, and credit ALWAYS.). Links are very difficult and too long to put in a bio, usually. A link to an image won't go if you aren't a subscriber so why waste the time? I will credit the website, the searcher would have to find it anyway. What I did was simply test the waters. I have used some Quaker record images, for example. I spent many $$$$ copying from microfilm at archives from 11 different states in my early days and now they are on line. Public Doman is public domain and according to date of issue, can be acceptable. The third party rule" has yet to be explained adequately. So, I am waiting to be sued. In the meantime, I will be cautious and credit and hope our good intentions with the little we use for our personal family, should hold some value. PS I did contact various newspapers and photographers and had no problem, but newspapers do not want all us calling them for permission! Kick me - Kiss me?