Abstract: Systems and methods for controlling access to resources. The methods comprise a data structure (e.g., a blockchain, etc.) using a parent NFT or child NFTs to control access to resources and recording data in a block indicating performance of a transaction or activity in relation to the resources. At least one block comprises the parent NFT with the child NFTs nested therein. The parent NFT may comprise a first smart contract defining a main policy for accessing or using the resources. The child NFT may comprise a second smart contract defining a sub-policy for accessing or using the resources.

Abstract: Systems and methods for controlling access to resources. The methods comprise a data structure (e.g., a blockchain, etc.) using a parent NFT or child NFTs to control access to resources and recording data in a block indicating performance of a transaction or activity in relation to the resources. At least one block comprises the parent NFT with the child NFTs nested therein. The parent NFT may comprise a first smart contract defining a main policy for accessing or using the resources. The child NFT may comprise a second smart contract defining a sub-policy for accessing or using the resources.

Abstract: A computer-implemented method for presenting advertisements based on user data is disclosed. The method may comprise extracting a mobile phone number associated with an internet user; generating an anonymous and unique identifier for the user based on the mobile phone number, wherein the identifier complies with a privacy rule; analyzing the user's behavior and/or interests to assign behavioral attributes to the identifier; receiving an input to select an advertiser based on a category of the advertisement; transmitting the identifier to the advertiser to generate an advertisement for the user based on the identifier; and receiving the advertisement from the advertiser and presenting the advertisement to the user.

Abstract: Systems and methods for controlling access to resources. The methods comprise a data structure (e.g., a blockchain, etc.) using a parent NFT or child NFTs to control access to resources and recording data in a block indicating performance of a transaction or activity in relation to the resources. At least one block comprises the parent NFT with the child NFTs nested therein. The parent NFT may comprise a first smart contract defining a main policy for accessing or using the resources. The child NFT may comprise a second smart contract defining a sub-policy for accessing or using the resources.