The recordings don't prove anything about what Coinbase knew.

I stand by my statement that the title is clickbait, as it's misleading on two fronts:

- It's the email, not the call recording that proves what Coinbase knew, but "recordings prove" sounds more sensational

- The email proves that Coinbase was aware of a sophisticated attack against a single user. You didn't have enough information to prove that there was a large scale leak of Coinbase customer data. There are sophisticated attacks against individual Coinbase users all the time due to the value of the accounts there.