Distributed ledger technology (DLT) is a digital system for keeping and managing the record of sender IDs and template. TRAI has introduced an advanced extension of the Blockchain – Distributed Ledger Technology (DLT) to prevent spam

You can go to below Operator:

Guidelines for Distributed Ledger Technology (DLT) for Enterprises:

Enterprises need to register with the Operator’s DLT platform by submitting necessary business documents.
Enterprises need to select a Registered Telemarketer (RTM) and permit them to perform functions on their behalf.
Enterprises need to acquire consent from consumers (mobile subscribers) through SMS, Web or Mobile App and upload them on the DLT platform.
It is mandatory for any entity that intends to send a communication through messaging and voice gateway on the DLT platforms.
Telemarketers and end-users have to register on the DLT platforms separately.