{"document_id":"BLC-STUDY-0456","slug":"erc-6147","title":"Guard of NFT/SBT, an Extension of ERC-721","authors":"5660-eth , Wizard Wang","year":2022,"date_label":"2022","publisher":"5660-eth , Wizard Wang","paper_type":"Design paper","category":"Credit and stable value","topics":["Credit and stable value"],"source_url":"https://eips.ethereum.org/EIPS/eip-6147","source_label":"ERC 6147","legacy_pdf_path":null,"sha256":null,"sha256_note":"No hash is published. This build does not store those PDF bytes, so a checksum would be invented. Where a legacy path exists, it points at the Internet Archive copy of the old library.","version":"Source cited by the 2022 study. The study is the reading. This page does not add a second essay.","doi":null,"rights_status":"Official external source only","source_status":"Official source","use_status":"Metadata and commentary only. The reading is the study page.","licence":null,"licence_label":"No licence recorded. Rights status under review.","full_text":null,"full_text_reason":"Full text is not published on this page. Public availability is not a licence to republish a document. Blockchain Lab has not recorded a licence that permits an HTML transcription, a training set, or a retrieval corpus of the paper. Text on this page is Blockchain Lab's own wording, or a pointer to a study that is also Blockchain Lab's wording.","editorial_line":"ERC 6147, Guard of NFT/SBT, an Extension of ERC-721. It separates the holding right and transfer right of non-fungible tokens (NFTs) and Soulbound Tokens (SBTs) and defines a new role, guard with expires.","canonical_url":"https://blockchainlab.com/whitepaper/erc-6147","record_url":"https://blockchainlab.com/research/corpus/papers/erc-6147","study_url":"https://blockchainlab.com/whitepaper/erc-6147","last_reviewed":"2026-10-01","last_checked":"2026-10-01","relationships":[{"rel":"Canonical reading","label":"ERC 6147 study","href":"/whitepaper/erc-6147"},{"rel":"Related paper","label":"Maker","href":"/whitepaper/maker-dai"},{"rel":"Related paper","label":"Liquity","href":"/whitepaper/liquity"},{"rel":"Related paper","label":"Aave","href":"/whitepaper/aave"}]}