If the poems published on the Internet are public websites (such as QQ space, all kinds of Weibo, except WeChat, of course, some forums are not all public, and "public" does not simply mean "all IP can be accessed". I'm sorry that amateurs can't explain why), without changing your user IP, you can legally purchase, lease and receive/purchase records by proving that this IP is your port (well, this word is At this time, your poems can be commercialized legally. Of course, the publishing house will probably ask you to stop publishing more poems independently on the website, and perhaps delete the published poems. I believe this.
If you have lost the sovereignty over your own poems, you can restore them through some legal channels, but this may not be realized or it will take a long time. In any case, please always be alert to anything that may harm your own interests, always believe that facts are more bizarre than novels, always be convinced of the correctness and fundamentality of original sin, and always be alert to the decadent, dirty, lowly, inferior and despicable world produced by the Qing Dynasty, and even more scum it unfortunately bred.