Reusable KYC. The verification you already built doesn't travel.

The unlinkability implementation described here is unaudited.

We say that here, first, because conceding it is the strategy, not a hedge.

The wedge

Every incumbent KYC vendor is a verifier: it checks a document, stores a pass/fail record in its own tenant, and repeats the whole check from zero the next time a different relying party needs proof. Solidus Verify is an issuer. Run the check once, and the result is signed into a portable credential, a W3C Verifiable Credential. That the user holds, not that we hold. The next relying party verifies the signature instead of re-collecting the document. Same credential, same signature, every destination.

Pick your path

Software vendors, already own a workflow (PMS, POS, dealer, rental) and want to add reusable identity without building a KYC stack from scratch. See the vendor comparison and pricing.

Regulated enterprises, telcos, fintechs, exchanges, PSPs, evaluating this against a compliance bar. See security for the full, dated picture of what is and isn't in place.

Developers, want to see the unlinkability claim work before trusting it. Run the unlinkability demo yourself: npm i @solidus-network/auth @solidus-network/bbs, then run the bundled demo file, no account, no trust required.

What we are, plainly

No named customer, pilot, or logo, none exist yet. Reusing a credential is convenience and cost savings for a relying party; it does not discharge that relying party's own regulatory KYC obligation. Full picture, dated, on /security.

did:solidus is registered in the W3C DID Method Registry (PR #713, merged); Solidus is a DIF Associate Member.

The math, not just the pitch

The protocol-floor cost of a re-verification is modeled dramatically below what incumbent vendors charge per check, but the honest number is worse before it's better: the first check on Solidus still costs more than an incumbent's per-check rate, because the saving only shows up on reuse. Worked example: at a modeled $5.00 for Solidus's first check versus roughly $1.50 for an incumbent's per-check rate with no reuse discount, and $0.05 modeled on Solidus for each additional presentation, the credential pays for itself once it's reused by the third relying party (n ≈ 2.4), math shown, in full, on pricing.