The On-Chain Analytics and Blockchain Intelligence Suite provides a dedicated environment for ingesting, processing, and analysing large-scale public blockchain data, with a primary focus on Bitcoin and Ethereum networks. Built on NVIDIA RTX 6000 ADA and H100 NVL GPUs combined with high-capacity storage infrastructure, CHAINTEL is configured to handle the volume and complexity of on-chain transaction data, supporting graph-based analytics, machine learning-driven pattern recognition, and temporal analysis of blockchain activity. Unlike general-purpose data analytics platforms, CHAINTEL is specifically oriented toward the structural and analytical characteristics of distributed ledger data, including UTXO and account-based transaction models, address clustering, and network topology analysis. The platform supports research and applied use cases spanning transaction flow analysis, entity identification, market behaviour modelling, and the study of emergent network phenomena on public chains. This testbed contributes to the CITADELS Framework by providing accessible infrastructure for blockchain intelligence research at a scale and specificity not typically available in standard academic computing environments.