Bruce Clinton Haack () (May 4, 1931 – September 26, 1988) was a Canadian musician and composer in the field of electronic music. Biography From Alberta to New York (1931–1963) Bruce Haack played on
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 0x4c6eb3ec221c22cdf1ef4c53e884ce8ae2a0b19a6e1f4d0556a1cb16d4f54dbd. 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/a3d43963-e1b9-46d7-a4e6-2328d953926e.json and https://artists.proofprofile.net/proofs/artist/a3d43963-e1b9-46d7-a4e6-2328d953926e.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 0x0d74a621899e5650b37ccd845d97e07fd7f4a5ee987760c96d1fce22a1427bb1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/US2S71021003.
Stand Up Lazarus (Peanut Butter Wolf Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8314db54865639c877064be5c24072ec2dcfe6047d17f3bfa0bc7b7f07e18b. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/US2S71291002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f84cb1e5915e748d02fc4e4220151541e461995481ac1ffc844c33d474e7fb. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:34:50Z), 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/QMFMG1478087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1238524ebeb343d469b5dfe0d028547974fd2d4132bcd1e802559c8e713d7d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMFMG1546092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9da691416221186ea205a942ef86c8749eb19338c538ec6de123c9591b9425. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMFMG1546093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576baa8d1efc5fa57d0b5da61b937cc39a532adb90e2ca140cc36c12860a0599. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QMFMG1546099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8513f87594b9ae697b9c05212fcc8e3d556a143b2cb353f3b4fd53e9dc77373b. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QMFMG1546100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928fb464223ec2c460ffd159116a89808edbc4ed48f1425b55dbafb61d3827f8. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QMFMG1546102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16a242f06a77f647a6901a3dbe7d0ba218135bd4c80dcc3cccdeab5d9078712. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QM6N21806216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8b22327cc4382b911b9755696acd909999286d4ab16a0c8bb02324f36dbba6. 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/QM6N21806217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43eb227f927a4476f8aa23370ea2d94714e056d9604fe9362fd03549c60f6e2. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QM6N21806220.