Real Time PCR Test Chemistry
There are two different ways to detect PCR product in real-time PCR: dyes which bind to DNA in general, such as SYBR Green I, or probes specific to your PCR product. There's a summary of the benefits of each here, with the following table:



You can buy either online; they'll be fairly expensive but I can't think of an obvious way to get them cheaper if you're interested in high-confidence validation.

[edit] forgot to mention that you will also need to normalise the reporter signal against a reference dye such as ROX (https://www.thermofisher.com/order/catalog/product/12223012).