Jacqueline Caryl Dankworth (born 5 February 1963) is a British jazz singer. She is the daughter of jazz singer Cleo Laine and musician John Dankworth. Career Dankworth was born in Northampton, North
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 0x897a51c16aad082d0e51e633fd8104ee1d9a249c6f839afdffbe06121e777a34. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5dcf909d-5d2f-49ab-b4cd-d3eb1ed4700d.json and https://artists.proofprofile.net/proofs/artist/5dcf909d-5d2f-49ab-b4cd-d3eb1ed4700d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Speak Low (Arr. for Voice & String Quartet): Speak Low (Arr. for Voice & String Quartet)
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 0xe816cd782c86f912d4ed11d48e270ad5c7a18cfbd3082766cd329e8e95de6e59. 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/GBLWD2200802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72eb6d290735634ff266d651406d5214e7d05308701b8bff925c6a189c4e1da. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBLWD2200801.
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
Sittin' on Top of the World: Sittin' on Top of the World
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9568157b5d1b5ba477ac3a1f929be14b9469a5be5ae0f725826c7de1a6f79b8a. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBLWD2200815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8f721fc67feb4a9a65610ff7d485cf975aa76eb746769819eee431fb76e585. 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/GBEEJ1300942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1589e8569699fe8a62e1c6a8decdcb095233a2305797ec8e6efa90ebb1c950a. 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/GBCWU0400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee82c27adbcec024705dca7a03fc4a5cea8e50214ae3d8a6afb0826afc716bdb. 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/GBCWU0400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff281bb75a5851d0ed96232d068bd681f3dafbf1d9085d3649b5504be608ca31. 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/GBCWU0400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a84aa95cde56b324de2c76a6f1f56ae8c0f3e83dcd90a3cc12813564e8d1af. 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/GBCWU0400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed44d4c48f77d2656090d252f13dd49168ce018f6c5b9eefeceddda2ae4323e. 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/GBCWU0400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8b2fe6ebd8b28b3679b702472144f215736a526c3ce6b25590ed60983887ea. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBCWU0400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffc66677f17a682c4a25904953e84677585ff33989330f4c9f42ae604fd5542. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBCWU0400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8327da4fc8dd6c3ab007daa1843e7d7a6ce69e9f227f0bb1a7639afc163febcd. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBCWU0400011.
Brough: Shall I Compare Thee to a Summer's Day