As an example, if you buy a copyright, the blockchain for that electronic asset will forever tell you about since the operator unless you initiate a market transaction. No you can return and alter that proof of possession. ??дк?ий?е дл? ?ебе ?а о??имай?е до???п до зап??к? нови? ?окен?в This https://lukaslcsgt.jts-blog.com/29255792/a-review-of-copyright