# A Non-Fungible Token and Blockchain-Based Cotton Lint Traceability Solution
## 2 Related Works
### NFT Solutions  
To further promote the integration of blockchain technology in supply chain management, researchers have begun to explore the application of NFTs in various areas of the supply chain for ownership confirmation and information traceability. [PERSON], [PERSON] et al. [22] proposed using combinable NFTs for the trading and management of expensive packaged products in the food industry. Based on blockchain technology, food products were tied to NFTs to achieve traceability and uniqueness verification, so as to guarantee product authenticity and security. At the same time, they provided implementation cases and methods that demonstrated the potential of combinable NFTs in the food industry. [PERSON], [PERSON] et al. [23] proposed a solution to the problem of medical device traceability and ownership management using NFTs, combining blockchain smart contracts, tokenisation protocols and distributed storage techniques. The authors also proposed using NFTs as a vehicle for medical device digital twins, to record device attributes and their associated metadata throughout manufacturing and distribution, up to their current use and ownership changes. [PERSON], [PERSON] et al. [24] proposed an NFT-based solution for healthcare products that used the IPFS distributed storage system to ensure data ownership and the origin's security, transparency and trustworthiness. This solution also provided a decentralised, secure and reliable database that enabled data analysis tools to access and verify the actual integrity of the data directly. The study by [PERSON], [PERSON] et al. [25] explored the challenges of the agri-food supply chain. It proposed using smart contracts and blockchain tokens to improve the third-party certification (TPC) process therein. The authors built a prototype system on the Rinkeby test network by customising Ether Smart Contracts with the ERC-1155 standard NFT, aiming to achieve the traceability of the origins of agricultural products, increased transparency and food safety and security. [PERSON], [PERSON] et al. [26] proposed NFT certificates and proof of delivery based on blockchain technology. NFT certificates contain ownership history information, which allows consumers to verify the authenticity of the goods and trace their origins. At the same time, proof of delivery records the entire process, from logistics to signing for the delivery, which serves as proof of purchase to enhance consumers' trust and satisfaction.  
In summary, work within the current research area has yet to explicitly propose and successfully deploy a solution for product traceability in the cotton lint supply chain using decentralised technologies. This study proposes to combine blockchain technology and NFTs to transform physical assets in the lint and cotton supply chain into a trusted digital twin. At the same time, it seeks to establish a transparent and traceable system throughout the entire supply chain, to ensure that all relevant parties involved can access and validate the actual status and flow history of the products in real time and to improve the transparency, trust and compliance of the overall supply chain.