PewPew - It's amazing that you posted that article. We are in contact with a Bruce Pon from bigchainDB and working really hard that he would come to our advisor team.

Answering your question about permissions to entry data to the nodes: single person's and car owners won't have permission to write car data into the nodes. Just because person is not a trusted source.

Only insurance, claim handling, leasing companies, national registries, other trusted databases and API's, certified workshops and dealers, etc. will be able to write information into the nodes.