Open Source Attributions?

[Kevin Mendel]

If I were to use gRPC (gRPC for C++ v1.75) in a product, I would need a rather specific list of open source projects (gRPC itself, and those it in turn depends on) in order to publish attributions, conduct a legal review, etc. 

Does this list exist anywhere?

I am not getting anywhere via visual inspection nor the scan tools I have available. I am surmising, and hoping, that this has already been done. 

Thanks in advance.

Kevin