Many of these websites default to showing future sales. After searching for an artist or artwork, make sure you use the filter for past auctions or sales.
"After Rembrandt" means the painter is NOT Rembrandt but someone else, whose art is modeled on the works of Rembrandt.
Artsy is a platform for online art sales, aiming to be "the most comprehensive resource for learning about and collecting art." Its Art Genome Project was created by data engineers and art historians, with the goal of grouping and connecting information about art works with customers' preferences and tastes. Create a free account to see additional data.
Auction house since its founding in 1766 in Great Britain, Christie's has locations in 40+ countries. Christie's records include details, bibliography, provenance, exhibitions, and lot essays.
French online auction platform, handling digital sales for ~600 auction houses internationally. "Hôtel Drouot, located in the heart of Paris, has been the world's largest public auction center since 1852."
Large British auction house since 1744, with locations in major cities worldwide; now also online sales and auctions. Create a free account to see additional information including provenance, exhibitions, and catalogue notes.