About NFTs

Blockchain addresses

I mint from two addresses belonging to Petite Révolte, my art and design studio. The first one is on Ethereum (see the part about carbon), from the address 0x40...a71e. The second one is on Tezos, at tz1T...Ew17Q.

I have personal addresses which should not see much use in the future, namely 0x9E71...eA50 and tz1Z...KoDM.

Carbon & energy use

The Ethereum blockchain has finally, after all, started using proof of stake, an energy-efficient confirmation protocol. Its former mode of operation was proof of work. Since proof of work rewards using as much energy as possible, I kept a running tally of my (overall modest) transactions on ETH, and periodically purchased carbon offsets to a multiple of their estimated kgCO2 impact. This was not a perfect solution, but it was the minimum I was willing to live with.

The per-transaction estimate was based on Kyle McDonald's ethereum NFT estimates here – which, for example, place Foundation at roughly 84 kgCO₂ per transaction. At the time the proof of stake merge finally happened, most of my activity had been through Foundation sales (2021), then a single Artblocks release (early 2022).

The offsets are by Terrapass, who contract out independent audits to confirm the efficacy of their project portfolio.