Comet (CMT) cryptocurrency is formally accounted on the number of ratings.. However, there is no up-to-date official information about its current status. Therefore, we can conclude that the coin is currently inactive.
Substratum is currently based on cryptocurrency Ethereum protocol.
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Also you can see the latest SUB price on Cryptogeek.info. You can leave your feedback and reviews about Substratum cryptocurrency here.
Scry.info (DDD) is an Ethereum-based token of the Scry.info global data aggregator. DDD token is listed on a few exchanges paired against bitcoin and Ethereum. In this abbreviation, “DDD” stands for "distributed data depositary".