Thanks for your comment! Tying your work to blockchains is definitely the way to go ;-)
I've no personal experiences with R.A.R.E., although I'm following them on twitter for a while. The biggest advantage of platforms like this is, that they handpick and actively curate their artists, while DigitalArtChain lets everybody tokenize their digital files. Curated platforms usually keep a share of the selling price in return for their work.
Most of those platforms also make use of the Ethereum network, which everybody can easily interact with through the Metamask extension. Right now it seems, that Ethereum based ERC721 tokens have become kind of a standard in the digital art market.
I'm wishing you a lot of success in selling your art and I would be interested in reading about your personal experiences with R.A.R.E. in the future.