BRC-100 has become one of the most discussed terms in the BSV world… and one of the least understood. Plenty has been written about what the standard promises. Far less has been written that actually explains, in plain terms, what a BRC-100 wallet is made of and what users need to know before trusting one.
Bridget Doran, the developer and educator behind the UTXO Engineer BSV fundamentals course, is filling that gap with a series of videos drawn from her own experience: she’s building her own BRC-100 wallet as a research project, and documenting what she learns along the way.
Doran is not a promoter. “I have been very cautious about joining the BRC-100 bandwagon for a bunch of reasons,” she told CoinGeek. What convinced her to dig in was not the packaging but the underlying design. “It’s a whole thing, the BRC-100 wallet universe, whose primitives I’ve come to appreciate. Very sound.”
Her reservations sit with how the technology has been delivered so far. “The part I’ve been reticent about is the packaging already essentially set up for everyone: the Metanet client, the BSV Browser. Even the BSV people were not ready for the change. It’s a huge departure from ‘the old world,’ and unless you see the bigger architecture holistically, you miss the why.”
And the why, in her view, is existential: “I understand the reasons behind the bigger architecture. In a nutshell, a scaled blockchain or [the] death of the whole idea. So that is why I took it upon myself to deeply understand what they are trying to do with all the BRCs in the umbrella. Still investigating everything.”
The four components, and the two you need to remember most
Doran’s framework, developed while building her own wallet, divides any BRC-100 wallet into four components: the seed, the state, the logic, and the interfaces. The value of the model is that it tells you exactly what you can afford to lose.
The seed is the user’s secret (users are accustomed to seeing this represented as a list of random words). Different wallets help manage it differently, but ownership is always personal. “It’s your seed. It’s not theirs,” she says in the video. Lose it, and nothing else matters.
The state is, in her words, “your journal and your key ring”—a database holding your derived keys, your UTXOs, your identity certificates, and your transaction history. This is the part most users don’t realize they need to protect. Because BRC-100 derives fresh keys for each counterparty (via the BRC-42 and BRC-43 standards), you cannot simply rescan the blockchain from a seed phrase to rebuild your wallet as older HD wallets allow. Everything still exists on-chain, but without the state database, you may not be able to reach it. The state must be backed up.
The logic (the wallet toolbox, the BSV SDK, the code that builds and signs transactions) is more disposable. It is standardized; rewrite it, and nothing is lost. The same goes for the interfaces: the dashboard, the command line, the shims, and even automated agents that transact on your behalf. Many interfaces can share a single wallet, and none of them is the wallet.
The rule that follows is simple. Seed plus state means full recovery. Seed alone means trouble. Logic and interfaces are just code.
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Using parts of the universe
Doran’s own commercial work shows that adopting BRC-100 does not have to be all-or-nothing. Her Traceport API, which provides business data attestations, “uses some of the BRC-100 primitives on purpose so I can bridge it to a fully sovereign version when I feel customers are ready,” she said. It is, she notes, an example of how developers and builders can use parts of the BRC-100 universe without committing to the entire packaged vision.
The first hurdle: funding the wallet
Another pain point Doran noted is that getting funds into a BRC-100 wallet from an old-style Bitcoin wallet is not obvious and trips up even experienced users. The reason is the paradigm shift itself.
“You need a counterparty that speaks the same language,” she said. “And when you don’t have that, you have to code around it with funky BRC-29 payment hacks, and build functions inside your wallet that internalize the payments. It’s a massive headache.”
Why has nobody explained it better? “You see how hard to explain that is to an everyday person? That’s honestly why it isn’t explained. People would go, ‘huh?’” Doran plans to tackle the funding question in a future video.
She plans to continue the video series. Of the four-part breakdown in particular, she admitted some early doubt: “It was so unique to my way of looking at things, I wasn’t sure how it would fly.”
For anyone who has nodded along to BRC-100 announcements without quite grasping what changed, it flies. The full video runs about 14 minutes and is worth the time.
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