No, it isn't. Nobody was talking about blockchains that far back. What this is about is the early pioneers of the commercial digital payment market that was eventually dominated by the likes of Paypal and Stripe.
Ref eg: https://arxiv.org/pdf/1810.06130.pdf
Chaum didn't invent p2p blockchains but his systems did have ledgers and stuff like anonymous payments between nyms.
Yes, the goal of DigiCash was that it would have occupied a similar place to Paypal (the goal of most early e-cash systems!) but the underlying technology was very different and a lot closer to what bitcoin became.