James Philip Durnford Lacey OBE (26 January 1881 – 8 June 1974) was a British politician and trade unionist. Born in the Southsea area of Portsmouth in Hampshire, Lacey completed an apprenticeship as
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacb3938614ce63510f14a3143a1d4f7e443179018b9abaf0d288f99a71c7163. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52a76eee-7b5d-4c04-9ae3-9df092fb3cd5.json and https://artists.proofprofile.net/proofs/artist/52a76eee-7b5d-4c04-9ae3-9df092fb3cd5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f060b24427d804d195ab0a3415bef811c692d1a8e33f6fdd9f48a6fa33b3012. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62380893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4120ea6f6f31bbac795f310e652494b83183742072e555fa715fabe65c78c71. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62359769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e4eef28a8a00b2512cf9b27026c1c6222471a4f4a9a5075347ec074e605a82. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2300432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244553e8c2879b34f3f274977da6986957670c9955ac5567bb2dc1994954f109. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2300336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d4a1449b8b91e6ff80e9514cd059b36264aee1c4358f5140e96c65461c4313. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18fd9d3daa1ce75671a5db4ff69aedc660c0763701f7472bb3053da707eb622. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62329717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf8563226b2c24be9c24b2ddc5e970e00461b2771f1182df764eef3a84c736e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62329718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fced4af12def1e0176acab4e4b858f981e921597c839f9aacb28bf76fa32615. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXW62300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e6b242089f5fdfd5e207a84553c9b9148000c0924e330699543a7e1fa241c7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLV62217200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2de762607292922be862d92cfac885c3ab7945c64e15b995d07b4da27719dc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2200963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2d2083fa17ac68525d7500ca5d1b932bd8c4a9d9952bc5b2bba8a5ee009070. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62278328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e074a9b19ed690c5a8596ae004460f0729c860e6fc49e23dd988b0617ba328. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ROROT2202140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f1547d70be00b5efa0a9d5db7dc8ab99bffd07a1de77e79681f918ee719a28. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62264868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f37e97ed4b2323bd5fc156e66ef9562d7d1161b37629e74c62c820ae18b97ed. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2200128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c49a7b7fed3b561600f8431f0c1dd6df2f262bda5b1077498a843e4108524ed. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2100841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1bb4648eba231e004d914894d9d2672f49f7ae712ed51e602a9cc74a6e8cd0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATGU62000091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0f17caf0685536b28e56e739dedc2532fee92487dfdf3e395195527270b511. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62499467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88cfa7820cd5c83e5580b6b45c0df1f6ac267886e4926dfa62c1ba0005aad70. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATGU62000191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016518602c9ded2de8834e5df68e23b4c0f1d4fde7516df2355e98c27df6e1ee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2401704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2617cb74d89ff120c5a7c372be1d89607668782df00c6280fd763753a9a0af62. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2401519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a26720a0590de14b9d875cc62f09e22cc146555f5017f6e72999cf6bb9e6a4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2500289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93d96ac33427f4faaaec6f5bb5f2f6fe936e1bb0a85e739860d545123a354f0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXBDT2412181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a41757141cfd2bc51d0de91a2611289720d4d25ac5b6de0e25e2a0b5821a5b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57f16a27463b293cc220803df014d8ff50aaa988f426e37d3ff5fbacd9d4e75. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH742438747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfc5525fd1a95a37ba70f93b1d05ee5a37d7117219c7e51cfd2c01723075f2b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2401403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0c15b21226a395f606b01163e3917da187fd569be763733e4900621efcd5b4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX5MY2416349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a8ab77afea99f81eca889753f32965d4d40b695e259948c755133b837405f7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX4R52424045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd715b0c6c294c437ff91116928b0ca20973a25653df7dadc00f1a399e89bad7e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BE8LH2400321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5859324bde2d7b1f6f2e19db67eba3ac6548bbc4a76eb60286d27a8f97dda33. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH742425568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854582de6c445eb147b673877f913b15663a00f16dfd614cfc240de00383d065. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62418443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181029c877b8562cc53ab10b211df23690056c014a1858155d7252fff4e5caec. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2400587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c35a7b5d4ceddf6447a093b7523ff239351a8580cf4070ed270deef27e2240. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2400492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29a80ebb29c3bc10fc4862cfecc1b79e59439e07de8ccb9c10b132537627b54. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62412618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c89ee8e181ed60aa92172209933f5e717a49f29e4c384118f69d79220764d9a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62400984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa043f2c43fc7d376465e4189edec06129e93d3e0ddfceb9bf7ed73295c616da2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATGU62000265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13f6a24a6d4d03df400211485606677c6f251ee001df5f94f839fa3e9979bcd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLT2H2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05bff41c0bdb308866d970a46b1e05523ba2ffb3a13761ce7264bc1d4551700. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATGU62000187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de7913a4e51f93a2233ba8c554cf86e15f8aca266804700d17be0f06c000aaf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATGU62000087.