Today, the Blockchain comes with many variations, including shared ledger, distributed ledger, mutable ledger, etc. In addition to that, there are adjoining technologies as the layer-2 setup and low code environments for smart contracts. Knowing them all and matching the individual's requirements is a must for the future IT industry. "Blockchain From Concept to Execution" is thoughtfully designed to match the need of the students and experts alike. Phase I covers the most widely adopted Blockchains of today. The first chapter starts with the very basic concepts of Blockchain that everyone should learn. The remaining chapters of this phase discuss some of the most popular Blockchains of today. TABLE OF CONTENTS 1. Introduction to Blockchain 2. Ethereum 3. Hedera Hashgraph 4. Tezos 5. Cardano 6. Algorand 7. Solana 8. Avalanche 9. Polygon 10. Polkadot 11. Cosmos 12. Comparison of Blockchains 13. Hyperledger Fabric 14. R3 Corda 15. Consensys Quorum 16. Comparison of Hyperledger Fabric, R3 Corda and Consensys Quorum 17. Decentralized Identity 18. Tokenization, DeFi, NFT and CBDC 19. Blockchain and 5G for IoT 20. Production and Beyond