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 0xfa29a1f1651f81ec06b5e278925242289cb0ccb566ab54d03c6b3d28f2ffb651. 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/79eca983-6331-4c2e-9d4c-7a643a455690.json and https://artists.proofprofile.net/proofs/artist/79eca983-6331-4c2e-9d4c-7a643a455690.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 0x90a1bb823aea0a3b6de1d2312c69beb2264c4d9af79baca2e6d4e978cae67c12. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZAE530700186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63bff4d9d008dfcb282cc457d89e7b7286f989c6c68defcd7954ded2248dd51. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/ZAE530700188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f677b906372d1e50fb57249e28f156599ad6ffc6ac8c9b11342dc819456d96. 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/ZAE530700189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0c51ebbac878d5106e47f7db970e687c1fe70821b76c5f384b7dab279f4834. 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/ZAE530700193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861fc049104902e795d7dc592d3b50ed76cf979b4d665e7810934251eff57d1d. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ZAE530700198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a217545af1a0f5501aec2b9b81e580b6dec59b029c61bc10a60da4444409f3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ZAE530700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a82b261e129dbf793a3e5cb55c736b9d4375e4c63ebb6f887a6aa01d9257a7a. 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/ZAE530700204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805f1d7d40303e63e66d6dae3ba70274b2377734484ada3a0b1d8c66456a7fbf. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/ZAE531000262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b9a9626eed30410c6ffb7cee06600c73b4975b0d86f2429999aefe8623761c. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USJ3V1248775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f677b906372d1e50fb57249e28f156599ad6ffc6ac8c9b11342dc819456d96. 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/ZAE530700189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861fc049104902e795d7dc592d3b50ed76cf979b4d665e7810934251eff57d1d. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ZAE530700198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaf37c1f61dad51f200aa00cd6b6e0d7346563693bd956a90eaf8b0d26f938a. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/ZAE530800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba28b09cc5e07d3a495b05c2752821e08cc2f957e542d5fb93da7a215bc5dd2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USJ3V1366908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfce6b7212335d5d0c8366b41536d7e1e4fa799e2bceb86ca87dc06d7a169c5. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USJ3V1373761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f0260771e8395108c661ed03026c9782ad8c1851ec6a9957ecd5542b95b9c8. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/ZAQR41702877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc067ff1f4b163b85985b35118dbc5d3772bc9c0a39a9ff15bdb4dabe15f79e23. 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/ZAO862100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44718ceb7f9720db9b6a34d42b5b407d2070e5ff57a369b01a52fd366f9946bc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ZA34K2301166.
Vuli Ndlela (Maak Die Deur Oop My Kind Trou Vandag)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b3e8ac73fc7dcda027b3d814e0814d8a5bdead695c665a2b47050d05483a7a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNWS2438695.