Arthur "Duke" Reid CD (21 July 1915 – 1 January 1975) was a Jamaican record producer, DJ and record label owner. He ran one of the most popular sound systems of the 1950s called Reid's Sound System,
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 0x592005866675c1639d36a7b69b5675df07bfb586d49c3f96a2c02ba58f133013. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0841987-af65-4a13-bcda-61a00e453cdd.json and https://artists.proofprofile.net/proofs/artist/d0841987-af65-4a13-bcda-61a00e453cdd.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 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 0x2aa8498e3093d4322c0bee65408416c86a8f6a5fa5037041d000e74a6e91d23f. 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/USQY51609261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86299e6dc7a651f403cb342df48d169d202968b77c463b8dab334d3a90faecf. 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/USQY51609262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25cf9b28ce62555502685577433f40a375dec7e679becaaf6da8809bb8192f6. 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/USQY51609263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcb425e0fbcdff0714f0b7545b61b309084babfc816a63c07f73eed702449c2. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USQY51609264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760df556f0e4307277c2a1f8b280130788b720454a292f7b6748fb1362360693. 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/USQY51609265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0b938917888c08c932b9689094b67bd074ad41785e8a2b7e0042a4ab8a78de. 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/USQY51609266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85041d6cd9df1412c71b6733cf53437345a88327154c93542702d5a124c9cb2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USQY51609267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2272a23c8e0a3d24cd695f1fbd80fa02f5a8fec8f900de96ca440f3d761678. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USQY51609268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5d36f57e583f11bdea2cfc852fd1d0f8ea9bb7cdb03334cc45a0e9a1c6c7e5. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/USQY51609269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f840c3d7cb48caefa05f7ed48ecdbb6a82a7aec069b0dc213fbd3ade4b6bdfb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USQY51609270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31e26092fd77a07db2fc472061b4aae44b4bd944fc6a647d5aa127572dad3af. 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/USQY51609271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb84d15ac81d2768a28bff3de2fdd5e36a1551cf1b2f7cf11ecc23d1e542d55a. 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/USQY51609272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e23027c0baae955ac39af0bf3f756b41a817fc6745e2b876f679be878756fb7. 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/USQY51609273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6141588f3df1246d7a078fd457750c39311a59b20573d2641cc38e7d2ce0c0. 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/USQY51609274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4c822878051988be8ace81ce3c8333373ca1f45dfe24863641ec3ce22b231f. 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/USQY51609275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13a0ba3c3ddbf603229a596ed27a588b1b7a5123c024c1f3bdc683b5c2b2c87. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USQY51609276.