Re: Building on the Block Chain, Adding Data to Transactions (How-To)
However, I am experimenting with a self-made copy-coin with the intended purpose of storing data on a blockchain.
Sounds like Namecoin to me.
What u want to achieve has already been implemented by Ethereum and they have made more than a million just by selling the packaged idea and not giving anything in reality. 
(emphasis mine)
Then you can't actually say they've implemented it, at this point they've only promised it.
OP's needs can be served by already existing technology, though. I'm sure Namecoin or NXT would work since they were both designed with the idea of storing arbitrary data on a blockchain. Depending on OP's needs, it might also be possible to use the Bitcoin blockchain with OP_RETURN transactions, that would still contribute to the ever-increasing blockchain size but unlike most other methods of storing data on the blockchain it has the advantage of not contributing to UTXO bloat.