They seem to refer to the CSXT rocket going even higher, but don't mention it by name.
And I still contend that recovery is necessary. USC RPL didn't claim Traveler III "broke the record" despite having good confidence it did given it didn't suffer a RUD during boost. They only "claimed" the record when they had a successful flight AND recovery. This is pretty much SOP for high altitude record attempts in the amateur rocketry community. I suspect it USAFA had recovered their boosted dart we would have most likely heard about it.
Kip's two stage flight from last year. https://www.youtube.com/watch?v=rdkqZV4RirI
Kurt's PHNX4 flight https://www.youtube.com/watch?v=g0imcpdLdB8
And Jim, well just have a look for Jim Jarvis rocket on youtube!
Tripoli's records page is a good place to get more info on high alt record flights. http://tripoli-records.org/records/
And TRF is excessively noisy but it's the place where Jim and Kip document their work. Curt's a bit more secretive comparatively. https://www.rocketryforum.com/
>(At the time of this writing the rocket and payload had not been recovered.)
Normally to claim these sorts of records recovery of the vehicle is required. USC RPL's Traveler III was "thought" to have reached space but they didn't turn the avionics on beforehand and therefore didn't verify or recover.