Boxship giants MSC and CMA CGM have joined Maersk and IBM's blockchain shipping platform TradeLens.

Data for nearly half of the world's ocean container cargo will now be available, the companies said.

"We're excited to have these two major carriers join. We have been in discussions with them since the end of last year, but talks picked up in earnest in the first quarter," TradeLens CEO Michael White told TradeWinds.

White said there were a number of areas to cover in the talks to help the lines understand the platform and its neutrality.