[{"type":"report","id":"BLC-STUDY-0457","title":"Hierarchical NFTs","author":[{"literal":"Keegan Lee"},{"literal":"msfew"},{"literal":"Kartin"},{"literal":"qizhou"}],"issued":{"date-parts":[[2022]]},"publisher":"Keegan Lee , msfew , Kartin , qizhou","URL":"https://eips.ethereum.org/EIPS/eip-6150","note":"Rights status: Official external source only. Not a licence to republish the paper."}]