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 0x0abd489b2f3f88becdc0ef3d6e349302649609577477acd359d49d9811d4b6cb. 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/c2683212-0644-4121-b5c8-b0179871eb14.json and https://artists.proofprofile.net/proofs/artist/c2683212-0644-4121-b5c8-b0179871eb14.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 0xec1dbb0c4d3ad3686991c8801b26123ba12e073f33e088836df63f99b398700a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ZA0AN2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6088465f1611ec91f719b85fcf5f406de7b51ee615629ac92dd0138fb667b4a7. 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/ZA0AN2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a76f595a267b6e13fa7df39de8fcb917079f219034ef09d80b8c0d8fdc2d16. 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/ZB88P2400431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949ec8b89201a7cfd1ad8912fcc42f405992edce49d127428b0d939287ebe42c. 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/GBKQU2449748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6667fcb65100197881112d827869bdb388ced04a471fbec9c7b0aeaf71f95ba. 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/ZBJNK2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b72300f01d2d10c476cea0725cbb53cf6b35add97a6614409ceba89b35f0c33. 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/ZB88P2300288.
Nguwe Wedwa (feat. Mashudu & Leandra.Vert)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d11780cdf49449c7c52016582a5d8633e410fbbcce9c825aca60f3ec8c729c. 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/ZB88P2300289.
Bathelele (feat. Al xapo, Optimist Music ZA, Leandra.Vert, Seekay & Chley)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2d41cf4c1d7d3c16b894b1107a5c7bb539cebab393a3e239989293aa4e0beb. 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/ZA56E2416685.
Bhuti (feat. Chley, Optimist Music ZA, Leandra.Vert & W4DE)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2dbed12f3445685b098ae33e8914f4d52af9147212940f0024ce0faf1bfdab. 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/ZA56E2416687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedef6b5ce3f6a000886eb93a49be63283e4de43df14c3750d10f379cb84bf5ec. 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/ZA56E2303925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a67752d7f34833ca49d2c24425dcfe0141df260f93e8fe5e6761d2f08ee934. 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/ZB88L2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b15abefe83ec4b4ca7d767c384a7e8b82d00c18a8f5fab030cb2f82515ae9a. 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/ZAUM72300961.
Mangena (feat. Chley, Kabelo Sings, Happy JazzMan & Leandra Vert)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06812ecee4b2dcb91d1469e650f1d9df12810a3602b25b43e11612a0be6d8e86. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ZB1OS2300242.
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 0x6031a55e85ef1173f7666e423a484f0d66cb1d4643a1f65330326a4f1781d96b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ZAQMT2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d630d88a3f5a960186651e1a6b5292132c7ae5e2223277f491522051a0cb594. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ZA6EE2000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561d0578e8606bdd330c3e89503472c61f254821739f13f2efabf4f0d4051540. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZWFR2328619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c202ee0474156e267b0064f5cfe9f056d4f26c1a2af8592affa392dbf6b9052. 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/ZA56E2315415.