There is the Amazon Transparency program that some manufacturers are participating in: https://brandservices.amazon.com/transparency https://brandservices.amazo

There is the Amazon Transparency program that some manufacturers are participating in: https://brandservices.amazon.com/transparency https://brandservices.amazon.com/transparency It is not decentralized, nor free, nor open to everyone, but I think it's close to what you're envisioning. Edit: I may have gotten it confused with the Amazon Elements program which looks similar.