As an example, if you buy a copyright, the blockchain for that electronic asset will permanently tell you about as the owner Unless of course you initiate a provide transaction. No you can go back and change that evidence of possession. То?г?й?е е?ек?ивн??е, вико?и??ов???и на?? ав?ома?изован? ???а?ег?? ??легко, ?видко https://landenhzplb.ttblogs.com/9548453/the-basic-principles-of-copyright