Independent research on bootcamp job placement claims
There's not much out there, unfortunately, and what there is is either suspect or sparse.


CIRR has probably created the best data that we have, as they engage in 3rd-party verification. These results are actually rather positive for the industry, although participation is voluntary, and there aren't many Bootcamps that participate.
The US Federal Government created the EQUIP initiative to convince schools to provide government-quality data in return for student attendees being eligible for financial aid.  Only five organizations qualified.  While I have been unable to locate the data itself, I would presume that those five organizations are probably fairly good.
Course Report is an independent organization that creates an annual survey of outcomes, and it shows consistently good results for Bootcamps nationally, but all of the results are self-reported, so they are not entirely trustworthy.  Also, the organization is very obviously friendly to the industry itself, with founders and employees who attended bootcamps themselves. Their "reports" simply look and read like ad copy.
There is a recent initiative by the schools themselves to create more accountability, presumably in order to counteract rumors that the institutions are simply fraudulent diploma-mills.


If you are considering a Bootcamp, I would strongly recommend only considering schools that have good results with CIRR, as that will both discourage fraud, and encourage Bootcamps to partipate in the process.