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Downloadable computer application software for blockchain-based platforms, namely, software platforms for distributed applications and software using a consensus engine incorporating blockchain technology for securing data with cryptographic information; downloadable computer software platforms for developing and building of distributed software applications and distributed computing platforms; downloadable computer software platforms for blockchains, namely, downloadable computer software platforms for managing cryptocurrency transactions using blockchain technology; downloadable software for creating non-fungible tokens used with blockchain technology to represent a collectible item; downloadable software for creating non-fungible tokens used with blockchain technology for data storage and content access limitation; downloadable computer software for managing and validating cryptocurrency transactions using blockchain-based smart contracts; downloadable computer software for managing and verifying cryptocurrency transactions on a blockchain