I would like to verify the year the boulder giant was built, the serial # is c41bd535.
Your bicycle is a
- Model Boulder W S in Lavender
- Serial number: c41bd535
- Product number: 330573
However that doesn't give a year. I found that using step 1 of https://www.giant-bicycles.com/us/registration
Your next options are to complete that registration process, and to look through https://www.google.com/search?q=giant+boulder+&tbm=isch and bicyclebluebook.com to match a photo against your bike.
For background, you may be interested in What is the purpose of a serial number?