Cowrie Research

paynym-bip47-primary-sources-2026-05-03

3 min read

PayNym / BIP47 primary sources — 2026-05-03

Project status in this pass

  • No separate canonical PayNym or BIP47 whitepaper/litepaper surfaced.
  • The clearest current source of truth is BIP-47 plus the first-party PayNym and Samourai explainer pages.
  • The materials consistently frame the project as reusable payment-code and wallet-identity infrastructure, not just an address alias or one-wallet UX feature.

Primary-source snapshots

1) BIP-47 specification

  • URL: https://raw.githubusercontent.com/bitcoin/bips/master/bip-0047.mediawiki
  • Key excerpt:
    • BIP-47 is titled “Reusable Payment Codes for Hierarchical Deterministic Wallets.”
    • Its abstract says payment codes can be publicly advertised and associated with a real-life identity without the privacy loss inherent to ordinary address reuse.
    • The spec defines purpose 47', notification keys, payment-code versions, and notification transactions that bootstrap private recurring payment relationships.

2) BIP-47 status nuance

  • URL: https://raw.githubusercontent.com/bitcoin/bips/master/bip-0047.mediawiki
  • Key excerpt:
    • The BIP is marked “Deployed” and says version 1 and version 2 can be considered final for compatibility purposes.
    • It also says future higher-version reusable payment-code work moved outside the BIP process.
    • The header’s comments summary says “Unanimously Discourage for implementation,” which is an important signal that the standard is historically important and deployed, but contested.

3) PayNym homepage

  • URL: https://paynym.rs/
  • Key excerpt:
    • The homepage calls a PayNym “Your Bitcoin identity” and says it consists of a memorable name and avatar associated with a reusable payment code generated from a Bitcoin wallet.
    • It says PayNyms eliminate address reuse and can serve as identifiers for interactive CoinJoins.
    • The framing is much closer to identity/contact infrastructure than to a simple donation address.

4) PayNym “How it works” page

  • URL: https://paynym.rs/how-it-works
  • Key excerpt:
    • The page says each PayNym is unique, private, and derived from the wallet’s BIP47 reusable payment code.
    • It explicitly says PayNyms can coordinate peer-to-peer CoinJoin transactions such as Stowaway and STONEWALLx2 via Soroban.
    • It also says wallet-key control can be used for AUTH47 challenge-response sign-in to applications and services.

5) Samourai PayNym explainer

  • URL: https://samouraiwallet.com/paynym
  • Key excerpt:
    • Samourai describes PayNym as a publicly shareable ID for sending and receiving stealth payments.
    • The page says PayNyms defend against “first touch” surveillance because they never reveal a normal Bitcoin address to anyone other than sender and recipient.
    • It also says that once two PayNyms are connected there is no longer any need to request a fresh Bitcoin address for each payment.

Working conclusion

PayNym / BIP47 is best cataloged as Bitcoin reusable payment-code and wallet-identity infrastructure. The deciding evidence in this pass was the combination of BIP-47’s explicit identity-associated payment-code model, PayNym’s public directory and human-readable handles, the coinjoin-coordination language on the official site, and AUTH47’s extension of the same wallet identity into application sign-in.

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