Perhaps. I’ve seen the chain-of-hashed-commits in version control software being described as an antecedent of the bitcoin style of blockchain, though I don’t know enough about the inner workings of any version control system well enough to compare, let alone the ones in use 20 years ago.
Edit: did I misread the title the first time, or has it changed from “the last 20 years” to “the last 35”?
The distributed version control systems you're talking about (Bazaar, Mercurial, and Git) all come out within a few weeks of each other in 2005. The chaining hash system for VCSes is either new or obscure before these systems adopt them: the major prior systems like RCS, CVS, and SVN instead rely on a central database with more-or-less sequential revision numbers.
Edit: did I misread the title the first time, or has it changed from “the last 20 years” to “the last 35”?