Deep Chain Reorganization Detected on Ethereum Classic

On 1/5/2019, Coinbase detected a deep chain reorganization of the Ethereum Classic blockchain that included a double spend. In order to protect customer funds, we immediately paused interactions with the ETC blockchain.
Updated Jan. 7, 10:27pm PT: At time of writing, we have identified a total of 15 reorganizations, 12 of which contained double spends, totaling 219,500 ETC (~$1.1M).
We will continue to monitor the status of the network and update this article with the most recent information we have. Current ETC network status can be found here.