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 0xd0e40cd20898b0019dd98e50daff88c5ef26dc0b59d0c6810807bc16b0a9082e. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6c50a93-07b3-4059-8672-108191b1103a.json and https://artists.proofprofile.net/proofs/artist/e6c50a93-07b3-4059-8672-108191b1103a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Brooklyn Days, Harlem Nights (Deluxe Single)
Supply Work, Demand Respect 1 (Walk With Me)
Supply Work, Demand Respect 2 (Rise To Power)
Supply Work, Demand Respect 3 (3AM In Vegas)
Supply Work, Demand Respect 5 (Moonwalking)
Supply Work, Demand Respect 6 (Blue Faces & Red Bottoms)
Supply Work, Demand Respect 7 (Thank You For Smoking)
Supply Work, Demand Respect 8 (3PM In Toronto)
Supply Work, Demand Respect 9 (Midnight In Miami)
Supply Work, Demand Respect 10 (Good Morning!)
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 0xc068d7ff7e4fe25d64c6eec3ebc0af2250affd1620c882138b97f9c6f462347e. 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/QZFZ72480176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe5b6583ed2e4a9f94979f136ea2a7f7d0c036835830806fb59f85a4c9866f1. 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/QZFYX2268801.
Supply Work, Demand Respect 10.5 (The Immaculate Collection)
Supply Work, Demand Respect 11 (6AM In New York)
Supply Work, Demand Respect 12 (Smokers Room)
Supply Work, Demand Respect 13 (Please Don't Cry)
Supply Work, Demand Respect 14 (Wizard Of Bars)
Supply Work, Demand Respect 15 (No Sleep Till Memphis)
Supply Work, Demand Respect 16 (Good Night!)
Supply Work, Demand Respect 17 (Wizard Of Bars II)
Supply Work, Demand Respect 18 (California Dreaming)
Supply Work, Demand Respect 19 (Wizard Of Bars 3) The Last Wish
Supply Work, Demand Respect 17 (Wizard Of Bars 2)
Lost Tapes Collector's Edition (1997, 2011)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe546fc8169c1b890f3b2055a841bdeffe63559fd2ed1b1c0db33620b37474c7e. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZTAX2582256.
Lost Tapes Collector's Edition (1997, 2011) Side B
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961c46f1301395b67f4253d184fccadff0a9bf2b43f5e97d71f917bd8c10ee54. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZTAY2527267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319725b962cbb31d516c08ba7eaaad63e578c8f650ed83d6ad147688eaa59b0b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QT3F52519971.