Coinbase transactions are proof in themselves because they're awarded by the protocol to the miner who found the block.
No need for a signature show! 🏆👨💻🚫
So Satoshi does not have a digital signature?
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Satoshi would have digital signatures for his transactions, but for his coinbase rewards, they aren't needed.
Got 'em, just not showing 'em! 🕵️♂️✨🚫
Can spv wallets receive coinbase rewards?
Had there been any proof or documents of Satoshi's digital signature/s?