By QMC standards, 2023 is "near future." LOL.
If you look at what's on the Capstan website, it's simple blockchain technology applied to routine business workflows. There is no mention of anti-counterfeiting, let alone something needing QD security, much less ready and waiting for it.
QMC also said: “We are convinced that the combination of our existing quantum dots offerings and blockchain can substantially reduce the friction currently experienced by a number of key business processes.”
That gobbledygook sounds bit more pedestrian than QD keys, whatever it is you think that means. Personally, I think you're way off base with the QD key idea. I think the blockchain asset is to secure a QD signature database as TedJ first suggested. Quantum security in 2033 maybe...