Alistair Ian Campbell (born 15 February 1959) is an English singer and songwriter who was lead singer and co-founder of the British reggae band UB40. UB40 sold more than 70 million records worldwide
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 0xf456f1fd29aeb1b28848924f3a7a1d595cce953451830e87e664f3c8422e64b5. 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/3fc884a9-caf0-4b47-a5e6-1d74930d78b2.json and https://artists.proofprofile.net/proofs/artist/3fc884a9-caf0-4b47-a5e6-1d74930d78b2.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 0x19e0b2a5c2ade8a9cd661f8b1d3b1e1f3bd63e34d6aab8e9e3b9778c949203a4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBSHY0700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355c2a98a8d974f4cf0106257a536a9b62df37ff388f805295704e292153eda0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBSHY0700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575a3d10dc6023ff8681936a81abe53098690bee73a8d4560274c10d73b5b924. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBSHY0700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7707cc597faf41fd76a4fb6c7b073004e624673c97cb429596e09af655d1993. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBSHY0700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247177a9133295de04759dc3e33e5ed5542322478e2134397897dc561745db06. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GBSHY0700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec256913a3e4ab169cb927a9fce3ea16d80c4ff44b0798e9bd30e272d9f0395. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBSHY0700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6801a2d681fec51cc3a0288875b9973c62eadd0e12a5858d92ebf67a6800a18. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GBSHY0700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8edefcad5b20194fdc59928bfdd95ada025e9d5e022df7bcf75a9b03b399f4. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/GBSHY0700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51db71d06b48c441d1f80323963541ba44d49d26dc638a162edba4dd8908fc58. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/GBSHY0700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e0b2a5c2ade8a9cd661f8b1d3b1e1f3bd63e34d6aab8e9e3b9778c949203a4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBSHY0700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cc36fe6e39ba15ce57e37d51f8ba358c27ab13ca88562ccdaf0242f90fb878. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBSHY0700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04b97f6320e0b38f4fe4ae36c0d21a05b9956f4c50afc7151b5d5c11d3e1b33. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GBSHY0700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e0b2a5c2ade8a9cd661f8b1d3b1e1f3bd63e34d6aab8e9e3b9778c949203a4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBSHY0700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a54a361e4e09df3ffd696832a524c42b897be3d90404ff5afcb3c7b3744af7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GB3GA1000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f574ed2c70c00cd34ca51121fe1f423668bebfd9846c06cef084b2ed270852. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GB3GA1000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cb2a6190a60c50cdb7fde0b153ce020cf1ddffdaa5bafc151f3e03c533b60c. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T07:36:28Z), 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/GB3GA1000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a54a361e4e09df3ffd696832a524c42b897be3d90404ff5afcb3c7b3744af7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GB3GA1000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387c2b39eeb8722f20e733e79a41bdfdcb2868c5a0c832aac88fd477cd9431e3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GB3GA1000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e6306b82f458f025ef484e5fc6ba055395d3d5f7f8ca0ba26e1e929e0e04e3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GB3GA1000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc15b765ffe7eb6206f291aab3a4fcf5a28567d9c17826cafe6480091ecd83a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GB3GA1000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30929cb0507f6c799fb931d86b38696612b31db4af00c53dc41b4fef2ab4e143. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GB3GA1000012.
Silhouette (The Legendary Voice of UB40 - Reunited with Astro & Mickey)
Silhouette (The Legendary Voice Of UB40 - Reunited With Astro & Mickey)
Silhouette (The Legendary Voice of Ub40 - Reunited with Astro & Mickey)
I Want You (The Legendary Voice Of UB40 - Reunited With Astro & Mickey)
I Want You (The Legendary Voice of Ub40 - Reunited with Astro & Mickey)
I Want You (The Legendary Voice of UB40 - Reunited with Astro & Mickey)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa395b778fe57898f7fca3b274091bb01c5b005d355327b029426ac900302c9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBCEJ1400151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dcecc89a2e4134e856a1c1a5f843451ca1825244775c18f112fa2c2ed1d353. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBCEJ1400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36e475626b77a43b6df65274b598c5b7dffe75cee4ae985c66c3aeede9786db. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBCEJ1400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf147af925f004dfe36287235564ec777f109c8c8ff2470b3dc54a8c577dac403. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBCEJ1400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e2c8de448f318e003f349a013dc225de7cf668037438d2b3266306df47cbea. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBCEJ1400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0573f248a82709376bbe749fa59fb3ecb2f6d75e95e3504361e919dad806e9a9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBCEJ1400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6ca88027ff64527be895e91c589c8c8c1c829223965bffe3b8a079880a54aa. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/GBCEJ1400162.
Baby Come Back (with Ali Campbell & Robin Campbell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9f34f5dcd877c3e5128bdb0587c205133f30db4421975f607eeb105272b075. 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/USIR39400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9f34f5dcd877c3e5128bdb0587c205133f30db4421975f607eeb105272b075. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USIR39400039.
Hemp! A Reggae Tribute to The Beatles, Vol. II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36ff6e96ece0ecbb6fc66f20c69dfdf6d40018fb311e7c3995c35f014f5c995. 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/AR1K21300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9f34f5dcd877c3e5128bdb0587c205133f30db4421975f607eeb105272b075. 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/USIR39400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9f34f5dcd877c3e5128bdb0587c205133f30db4421975f607eeb105272b075. 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/USIR39400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec30dd1a21ac788d925b41424d74c6a105193945b6f8b4fb9c7c1ea40a9947cd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P1294620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9f34f5dcd877c3e5128bdb0587c205133f30db4421975f607eeb105272b075. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USIR39400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bf6ffbc189efde8717d4979a580bfbdf05f58002ac0cc2bec41addd4589e13. 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/ARF411001300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bf6ffbc189efde8717d4979a580bfbdf05f58002ac0cc2bec41addd4589e13. 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/ARF411001300.