Such as, if you purchase a copyright, the blockchain for that electronic asset will eternally provide you with as the owner Until you initiate a promote transaction. No you can go back and change that evidence of possession. ??п?й?е ?а п?одавай?е на ?по?овом? ?инк? за допомого? ?оз?и?ени? ?н????мен??в - https://williamb074ubg9.wikiconverse.com/user