Derek Wadsworth (5 February 1939 – 3 December 2008) was an English jazz musician, composer, and arranger. Early life Wadsworth was born in Cleckheaton, Yorkshire, on 5 February 1939. He began playing
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 0x195236f90876f2f1d66b5c6551b384cdcf6c96b04dee7d12e807cf4ddf912df2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6b9b010-bce9-49f0-ad62-c7d0b5f407cf.json and https://artists.proofprofile.net/proofs/artist/c6b9b010-bce9-49f0-ad62-c7d0b5f407cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fellini - Rota La Doce Vita (Original Soundtrack)
Space: 1999 Year Two (Original Television Soundtrack)
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 0x335769be731f3d8ad729723e0a0d0604730363557008ce8381aed42387923ec7. 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/GBAJC0900366.
The Lonely Man Theme - From "The Incredible Hulk"
The Definitive Superhero Themes Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f36488d5a5c3c8978c7351a76af0486440e4321f9f4bf290e8960befc6cc8d3. 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/GBAJC9600241.
The Ecstasy Of Gold - From “The Good, The Bad And The Ugly”
The City of Prague Philharmonic Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0950c0b37a679a6c8e28ec81b93eae1a76bafaf0929d0b1bf359e06922adefa9. 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/GBAJC9801204.
Main Theme - From “A Fistful Of Dollars”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d08e239f457024cba8d52b8b43b410a590628b499fc1e24e8c07cf69ebff187. 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/GBAJC9700421.
Main Theme - From "For A Few Dollars More"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65953055e23b719b0a4f7beeaf76f5dcd5ed7c60e43cfdaaf7af64abf2b68c9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBAJC9801190.
The Ecstasy Of Gold - From "The Good, the Bad and the Ugly"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0950c0b37a679a6c8e28ec81b93eae1a76bafaf0929d0b1bf359e06922adefa9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAJC9801204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0950c0b37a679a6c8e28ec81b93eae1a76bafaf0929d0b1bf359e06922adefa9. 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/GBAJC9801204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d08e239f457024cba8d52b8b43b410a590628b499fc1e24e8c07cf69ebff187. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBAJC9700421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65953055e23b719b0a4f7beeaf76f5dcd5ed7c60e43cfdaaf7af64abf2b68c9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBAJC9801190.
The Good, The Bad and The Ugly - From "The Good, The Bad and The Ugly"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fa1d7494cbc1a3a31e4b4554ce75bb07e3d1535bfa29aaa46a91be26643196. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBAJC9801205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65953055e23b719b0a4f7beeaf76f5dcd5ed7c60e43cfdaaf7af64abf2b68c9. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:34:48Z), 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/GBAJC9801190.
Main Theme - From "A Fistful of Dollars"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d08e239f457024cba8d52b8b43b410a590628b499fc1e24e8c07cf69ebff187. 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/GBAJC9700421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65953055e23b719b0a4f7beeaf76f5dcd5ed7c60e43cfdaaf7af64abf2b68c9. 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/GBAJC9801190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8e6e16de2b77a550add5d61a9bb6645017e69121a69f7f2cab33e2f528b263. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBAJC9300025.
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