To get a list of chaintips for all nodes run:
rake blocks:get_chaintips
Node 1: Bitcoin Core 0.17.99:
HEIGHT | BRANCHLEN | STATUS | HASH
-------|-----------|---------------|-----------------------------------------------------------------
572319 | 0 | active | 0000000000000000002671de2c0d7966398eef6c36e5c23706e36f2b6ba34633
525890 | 1 | valid-headers | 0000000000000000003d068ec400b1042b8d1ed867cf3c380b64ca074c6d12c7