chore: add SPDX copyright attribution and a NOTICE file

NOTICE

@@ -0,0 +1,18 @@
+dotNS
+© 2026 Parity Technologies
+
+This product is licensed under the MIT License; see the LICENSE file.
+
+Third-party components retain their own licences, stated in each file's
+SPDX-License-Identifier header, which is authoritative:
+
+- contracts/external/revive/ISystem.sol: pallet-revive system interface,
+  from the polkadot-sdk project (Apache-2.0).
+- contracts/external/personhood/IPersonhood.sol: Proof-of-Personhood
+  interface (GPL-3.0-only).
+- contracts/utils/Multicall3.sol: Multicall3 by its original authors
+  (mds1/multicall3, MIT), vendored with only a pragma update.
+
+Build and test dependencies (OpenZeppelin Contracts, forge-std, and
+others) are fetched at build time under their own licences and stay
+outside this repository and its release artifacts.

README.md

@@ -312,4 +312,4 @@ The protocol carries a handful of constraints worth knowing before deploying or
 
 ## License
 
-Licensed under the MIT License. See [LICENSE](./LICENSE). External interface definitions under `contracts/external/` retain their upstream licences (the SPDX header in each file is authoritative). Security policy and disclosure: see [SECURITY.md](./SECURITY.md).
+Licensed under the MIT License. See [LICENSE](./LICENSE) and [NOTICE](./NOTICE). External interface definitions under `contracts/external/` retain their upstream licences (the SPDX header in each file is authoritative). Security policy and disclosure: see [SECURITY.md](./SECURITY.md).

contracts/deploy/Create3Factory.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {CREATE3} from "solady/utils/CREATE3.sol";

contracts/escrow/DotnsNameEscrow.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

contracts/escrow/IDotnsNameEscrow.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 /// @title Dotns Name Escrow Interface

contracts/pop/DotnsCostModelRegistry.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";

contracts/pop/DotnsFlatPricing.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {IDotnsPricing} from "./IDotnsPricing.sol";

contracts/pop/DotnsScarcityPricing.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {IDotnsPricing} from "./IDotnsPricing.sol";

contracts/pop/IDotnsCostModelRegistry.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {IDotnsPricing} from "./IDotnsPricing.sol";

contracts/pop/IDotnsPricing.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 /// @title DotNS Pricing Cost Model

contracts/pop/IPopRules.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 /// @title Proof of Personhood Rules for Dotns

contracts/pop/PopRules.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

contracts/registrars/DotnsPopController.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

contracts/registrars/DotnsPopLens.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {IDotnsPopLens} from "./IDotnsPopLens.sol";

contracts/registrars/DotnsRegistrar.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

contracts/registrars/DotnsRegistrarController.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

contracts/registrars/IDotnsController.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol";

contracts/registrars/IDotnsPopController.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {IDotnsController} from "./IDotnsController.sol";

contracts/registrars/IDotnsPopLens.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {IPopRules} from "../pop/IPopRules.sol";

contracts/registrars/IDotnsRegistrar.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {IERC721} from "@openzeppelin/contracts-upgradeable/token/ERC721/ERC721Upgradeable.sol";

contracts/registrars/IDotnsRegistrarController.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {IDotnsController} from "./IDotnsController.sol";

contracts/registry/DotnsProtocolRegistry.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

contracts/registry/DotnsRegistry.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

contracts/registry/IDotnsProtocolRegistry.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 /// @title IDotnsProtocolRegistry

contracts/registry/IDotnsRegistry.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 /// @title IDotnsRegistry

contracts/resolvers/DotnsContentResolver.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

contracts/resolvers/DotnsPopResolver.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

contracts/resolvers/DotnsResolver.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

contracts/resolvers/DotnsReverseResolver.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

contracts/resolvers/IDotnsContentResolver.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 /// @title Dotns Content Resolver

contracts/resolvers/IDotnsPopResolver.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 /// @title IDotnsPopResolver

contracts/resolvers/IDotnsResolver.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 /// @title Dotns Resolver

contracts/resolvers/IDotnsReverseResolver.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 /// @title Dotns Reverse Resolver

contracts/store/IDotnsStore.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 /// @title IDotnsStore

contracts/store/ILabelStore.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {IDotnsStore} from "./IDotnsStore.sol";

contracts/store/IStoreFactory.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 /// @title IStoreFactory

contracts/store/IUserStore.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {IDotnsStore} from "./IDotnsStore.sol";

contracts/store/LabelStore.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

contracts/store/StoreFactory.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

contracts/store/UserStore.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

contracts/utils/DotnsConstants.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 /// @title DotNS Constants

contracts/utils/LabelUtils.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 /// @title DotNS Label Utilities Library

contracts/utils/RegistrationUtils.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {IDotnsRegistrar} from "../registrars/IDotnsRegistrar.sol";

contracts/utils/StoreAuth.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {IDotnsController} from "../registrars/IDotnsController.sol";

contracts/utils/StoreUtils.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {ILabelStore} from "../store/ILabelStore.sol";

contracts/utils/StringUtils.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {Strings} from "@openzeppelin/contracts/utils/Strings.sol";

contracts/utils/SubnodeUtils.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {IDotnsRegistry} from "../registry/IDotnsRegistry.sol";

contracts/utils/SystemUtils.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {ISystem} from "../external/revive/ISystem.sol";

contracts/whitelist/DotnsNameWhitelist.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

contracts/whitelist/IDotnsNameWhitelist.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2026 Parity Technologies
 pragma solidity ^0.8.34;
 
 /// @title IDotnsNameWhitelist