Congratulations to the team on the release. It's exciting to see more companies entering the market.
We built a similar service [0] although from the first look it seems we took a different path. Our approach is to crawl all videos and music on the web, fingerprint the multimedia content and search through the fingerprints.
We just recently passed 4B indexed videos (we run a bit large scale [1]). Thus our results are bit different. Here is an example for gangnam style for comparison [2].
Anyway good luck. Feel free to reach out if there is anything we can do to help.
[0] https://pex.com