World Party was a musical group, predominantly the solo project of its sole consistent member, the songwriter, producer and multi-instrumentalist Karl Wallinger.Karl Wallinger obituary by Robin Densel
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d3d23557a43961c4038755430b63398677dd3308bae212970edd0598e0133b. 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/ec7c1e9c-e43d-4809-8508-9b5d5800284c.json and https://artists.proofprofile.net/proofs/artist/ec7c1e9c-e43d-4809-8508-9b5d5800284c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d6bebfc4ca56375c5f4496745d7af22640eb387168172abdb0205ac4e1afbe. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:09:15Z), 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/GBCZS0000051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12988936f5c8abfa68175b1c361d66c26c3fa8840b73696ecf3645553f3f04a. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/GBCZS0000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55037c65193e529a94790711ba5941afd6adb40bd5b4f5010c237cfe6cfc99fd. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/GBCZS0000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687f7e21e15bf7b8545222d1b98dd3beb7628d782e990d20f84485d864bac202. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:51:16Z), 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/GBCZS0000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733b376347257c49d8d060bf94e36ff8cdd687d513f5f16aa61d667dee0f248e. 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/GBCZS0000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac8e0493919182224230b1aac7e42f4f949c35f14a32722f4f371b902344903. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/GBCZS0000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfd0992ac7c3dcae8a521b78780e3cbdbb4afb6463c5eb3dacb4ed80e612282. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/GBCZS0000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18c721604f791b6f0f68a78b5a0bc7030076546f41e048b67a2fdbb5e51563c. 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/GBCZS0000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad10f12bbba6b2887dcb76741aae59f9f44ad804e3d8548d50794af7c2c9dc4. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:03:04Z), 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/GBCZS0000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57cbeff7c98dd2c78e694fce8a427faa359b5fe36d8d673268ce9902ae73882. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:55:39Z), 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/GBCZS0000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ada0789663d4672dd08a4a2c92da9450f54dac0613b86042d50809600a3239. 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/GBCZS0000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f5bcf2e2377435e858edbbec37f3948e48ccd2b6a2e0a55df32d62c8b70452. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBCZS0000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ee1a7527d132b59d72a9f9995fac13cb58d23940f144ee311e2ed58a5fe4af. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBCZS0000112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9161f8144aa6077a1d71d0d43b46deccff1a9bc82970bad5893ee581c55ede9. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:53:21Z), 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/GBCZS0000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fb879cef7bdc46a7115bd137e2ae09e0492b6cce4b3e1dd884c47085794859. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USEER0600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0dbd6bc21214c5789d143c5e8dc9cb3322c687ccd796b2a11f8c3752799971. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USEER0600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e47d113ea54c64ed35d43f6b42cfd69005eb098ca634cbef6e7925394c3de2. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USEER0600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309c9384cea39c0715c22ea6c5d9de1a15a2405fa7641707fe808e6fa906479c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USEER0600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c29fd91d84f8f8d2ca6b4c58f2e1fc34a0c3ab71fdabc101041290e0e75495. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USEER0600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03846d28c883fff16ad283eb8ba8104e3908ae3d2c5f03754fa9cf1f3bb420a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USEER0600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fd5be52f764c27fd3120b625b1cf7060173ac7cdb8360b1a2f04ad7f7ae0da. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBCZS0000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698429605d41c58349669ddf7a5d8625dd01a9f4223c14cc061f716b94312eba. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBCZS0000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4890a737dda70a4c960254d8383d21bc205666a1f9da908df7e69bc6cb3b619d. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/GBCZS0000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1280e18c9d5fc73e9f33901ef60d7b3eaa15144ebe1fd42fa681277ef4205e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBCZS0000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb076e77b9c05fd17e82b22743255030811d034e8bb7e204108f2b0b79fe567. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBCZS0000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf830b8e70b5f29b15f8ebe6e3a15aeb8f0f9044c860135eb8e87318387a8ad2d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBCZS0000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2e2144625e7e1e0667a02127dbf5d98d1f8c63067b27e3d1f0b1329ff58a85. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:06:40Z), 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/USEER0600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dbdddf29bd6d7234eca4f7cb61f6b512afd3fa8d34cd0c88575a3c96d5af74. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USEER1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43f9b0047d18afb59e3b4fea2d5756f34df3bf0228268b346b4c18ddc1be6b3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USEER1100008.
Live! at the Picturedrome, Holmfirth, UK
Big Bang Concert Series: World Party (Live)