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 0xce8aea021cfef5fa85d5813ace588cd3c6354ce28f11b966cc6f7c51f0aa75ca. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10976f76-08f5-4de7-a874-79c67b35322d.json and https://artists.proofprofile.net/proofs/artist/10976f76-08f5-4de7-a874-79c67b35322d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
We All Connected (feat. B33kay SA, Mazah)
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 0xaa0eedb10fbeef70028192e960f408295c1b14fe7356116c659507b0174f8dc7. 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/ZA97K2300103.
Uthando (feat. Nokwazi, Lowsheen and Caltonic SA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddaa3d6d4c80ff0859466571a2f086555cfc121d2c0572af8369d91cf39de48. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZA56E2102220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5ed181b81803944dc644b0110d2671bfb4b73106cc86b992e6a309d743466e. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/ZA56E2304157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c3026602a96054383361fc2b67a617640cb2b0e81056cbab2f3d9d49112beb. 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/ZA56E2101705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b9520ff1f5ea8c828ba1e936103043e2c17964ed77fa5f08fa436f417353a9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZA97K2100110.
Ngiyabonga (feat. Master KG, Lowsheen, Sax and Basetsana)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78539469a6e7204c2060fa5166aee3faed13c268ae14a39644e4c2321272fe63. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZA97K2100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312c3ef98f4cb1520f79315400ca7bbedd595c436d676739a9aab93f399e3e39. 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/ZA97K2100114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef63829b0740bc3d9525beed11df153793484301de45727f8fc513e67bd99b3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ZA97K2100115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716bf3a9402ddda1dd9f931242989dd23d6dee588a43a7a5e97b04d4a5f82373. 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/ZA97K2100117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb6701fc1dd304f726d323acd5578fae49a620c604884dbea10f30ca84848c6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM7282109653.
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 0x0147bd0db2d5ce578ac4c03dda9ebd0873383d4f244c051989e076aa30c31e48. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ZB5W62400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a1a08620182d14c2fbd6d6d3281b959b1dea1c9b20bb6811fb934d36738f9d. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ZA97K2100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e14b4e82301153a33696bb160b231082834fcbe3639d2cd7aaebb66672cbc8. 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/ZA97K2100113.
Nghamba Nawe (feat. Musa Keys and Magistics)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66739ab4d470b3148458878e8547c11dbd1110f7d15610e7feb36893b19665ed. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ZA97K2100120.