In addition to artists' own websites, another great place to look for information on artists is their galleries. Often, the gallery will post images, detailed bibliographies, exhibition records, and biographical information on the artists they represent. Some artists do not maintain their own websites, and instead let their galleries serve as their authoritative web presence instead.
An example of an artist's website:
An example of a gallery's website:
There are a number of commercial websites that offer information about artists and images of artworks in order to help potential buyers learn about them. Dealers, galleries, and art fairs pay these sites for the exposure and sometimes pay for ads on the sites as well, so they are definitely for-profit, non-scholarly sites, but they can be very useful for researching contemporary artists such as for dates and determining gallery affiliations.
Here are several big, daily news sites that cover the contemporary art world:
The way global contemporary art is exhibited, promoted, bought, and sold: