@celesteh Not fully correct.

First, you'd only need a new opt-in, if people you were contacting weren't ever subscribing, i.e. if there was no prior opt-in, or one that is incompatible with the GDPR.

Second, consent is one of several cases in which the data processing is legal. There are other legal terms such as contract, legitimate interest etc. that could apply.

Third, there is certainly a gray area when it comes to the network of your fellow artists. E.g., they could be personal contacts.