The question is a shopping question because it asks, and I quote:
Does anyone know of any RAID cards which can be configured to check the parity of a redundant array every time data is read, and verify all writes with a read to ensure that the data on a single disk didnt become corrupt?
As well as:
I am specifically looking for a controller which can verify on write and check pairty on read.
There is a history of not allowing subjective shopping questions on StackExchange (a rule more faithfully followed on some StackExchange sites than others). Yes, there can be a method of asking a shopping-style question that is acceptable. To quote that blog post:
However, there is a way to ask these questions that avoids the inherent problems with shopping recommendations. For example, let’s say you wanted — as I did — to buy a point-and-shoot camera that takes good low light photos. [...]
Q: What’s the best low light point-and-shoot camera?
[...]
Q: What’s the best low light point-and-shoot camera?
[...]
The former question provides the path of least resistance: a laundry list of products I can buy without thinking about it too much. But that answer will only be valid for a year at best. The latter question may take some thinking, but its answer will be valid forever … or at least until camera technology somehow shifts beyond lenses and sensors as we know them today.
However, the proper way to ask a shopping question is to not ask it like an explicit shopping question, but rather as a question seeking to understand how you determine what you need.
Your question is not seeking to answer something along the lines of "How can I determine the necessary features in a storage card when my goals are thus-and-such?" Your question was explicitly seeking specific RAID cards, not methods to discover the proper technology to solve your problems.