Non-fungible tokens, NFT, have been used to record ownership of real estate, art, digital assets, and more recently to serve legal notice. They provide an important and accessible non-financial use of cryptocurrency's blockchain but are peculiar because ownership by NFT confers no rights over the asset. This work shows that it is possible to specify that peculiar property by combining functional and epistemic properties. Suitability of the specification is evaluated by proof that the blockchain implementation conforms to it, and by its use in an analysis of serving legal notice.

翻译：非同质化代币（NFT）已被用于记录房地产、艺术品、数字资产的所有权，最近还被用于送达法律通知。它们为加密货币的区块链提供了重要且易于使用的非金融用途，但其特殊之处在于，通过NFT拥有的所有权并不赋予对相关资产的权利。本文表明，通过结合功能性和认知性属性，可以描述这一特殊性质。该规范的适用性通过区块链实现符合该规范的证明，以及其在送达法律通知分析中的应用来评估。