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 CONTENTS1. Introduction to Blockchain2. Ethereum3. Hedera Hashgraph4. Tezos5. Cardano6. Algorand7. Solana8. Avalanche9. Polygon10. Polkadot11. Cosmos12. Comparison of Blockchains13. Hyperledger Fabric14. R3 Corda15. Consensys Quorum16. Comparison of Hyperledger Fabric, R3 Corda and Consensys Quorum17. Decentralized Identity18. Tokenization, DeFi, NFT and CBDC19. Blockchain and 5G for IoT20. Production and Beyond