> Is it "locked"? Yes, by copyright laws, if you don't like that lobby to have them changed.

I don't if that is true: a lot of old books might still have copy or other rights associated to them, likely owned by author and/or publisher, directly or inherited, but often those who have the rights do not have digital or physical copies at hand anymore (some old books are, well, really old). Does Anthropic make sure to track down, contact and then share the digital copy they make with those who have rights on the work? If not, they are not making it in any way easier to re-print the books, while making their supply more scarce (they destroy existing embodiments).