>but they will demand proof that the ivory was sustainably harvested
yes, i'm sure this is true for 100% of people buying fancy pianos, and "proof of sustainable harvest" isn't at all a loophole that gets used to sustain an illegal ivory trade.
The music industry is very good about this. Which is actually easy because there is no current source of sustainable harvest ivory. (and when there was a source it was in such limited quantities that no major manufacture would bother)
yes, i'm sure this is true for 100% of people buying fancy pianos, and "proof of sustainable harvest" isn't at all a loophole that gets used to sustain an illegal ivory trade.