I'm one of the authors behind https://www.adoptopenjdk.net (CI at ci.adoptopenjdk.net, project at github/adoptopenjdk) where we are providing nightly and release builds of OpenJ9 (as well as a host of other OpenJDK derivatives). We've recently been granted the TCK (as the London Java Community) and so you'll shortly have professionally tested 'You can call this Java' binaries.
I'm one of the authors behind https://www.adoptopenjdk.net (CI at ci.adoptopenjdk.net, project at github/adoptopenjdk) where we are providing nightly and release builds of OpenJ9 (as well as a host of other OpenJDK derivatives). We've recently been granted the TCK (as the London Java Community) and so you'll shortly have professionally tested 'You can call this Java' binaries.