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 0x0110facbdf5ee54dd5926ec8c77402aaf1d4ae898ba3f02e543a79b13000dafc. 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/023f5cac-5d32-4d35-9584-ad30c4d2a869.json and https://artists.proofprofile.net/proofs/artist/023f5cac-5d32-4d35-9584-ad30c4d2a869.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 0xef9ed9e3ddd16a8ddd41e1cfea948da24eb7a495c5721394d532c9ea1bf80fd1. 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/NLRD51968888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b4fd9ed471e71461269eda9a400cf32a97235622e1bbb7045e8679dfcb60ee. 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/NLRD51968895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9ed9e3ddd16a8ddd41e1cfea948da24eb7a495c5721394d532c9ea1bf80fd1. 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/NLRD51968888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b199db0f1bb2c0d7c033a98d34b15712a9a20ab043b31a1729017a4dcd44715. 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/QZAKB2351204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35436886a957ebff5195915fa4760333d75fda75868fecbefbfd76117af0099. 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/QZWA32200614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf326c7745b227c275e859b1234a21266c8190f3381bff87c4ef9f1bb0a02773. 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/QZWA32200620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf326c7745b227c275e859b1234a21266c8190f3381bff87c4ef9f1bb0a02773. 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/QZWA32200620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451dd453a0dcf0a69b6eca8aeac825058b9e3c0f86cf9fbc9e712934febc030b. 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/US38Y2414676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b13dbd168a8cc31497cefde35126cec718f900bc0c79bf130d52f52f487fd8d. 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/US38Y2421484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612cce69566219a221325961103aba8f0fd379f9e8c7478efcc87d3e54470d72. 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/US38Y2421485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d2e76b8df59e04b0bc917defe4471e7b1d62285a93a0dc5df6749f3acddb8f. 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/US38Y2421488.
Sendibona (feat. Major League Djz & Makhanj)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637508ebaf1877c37c7458371287067a06f2f135ccd82bc16d5e1fb288074e7c. 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/US38Y2421486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1ca4f64abe55f01cd6033a98ccab24f284d475db93610660bdb9aa79c96c75. 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/US38Y2413779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480d5fff70d5d3532dad21b8e02161dfbe4c02bcb6ea7cefbe7c58f5aa1ed4f3. 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/ZA34K2402155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480d5fff70d5d3532dad21b8e02161dfbe4c02bcb6ea7cefbe7c58f5aa1ed4f3. 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/ZA34K2402155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417f3022d4566df5ff524869f7ccc4888fe8951ad0760443a00a94fb00377056. 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/ZA34K2402156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2728a2bbeb21a2fde8a99a3dbc10687d4b571b014d66f1a671f252699b2f0ac. 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/ZA34K2402065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cae8ff77ca2e70ab3f174982d76341e596189871e301fa2e5ecc324f7cba867. 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/ZA34K2402157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88b83c584344d0a73786a01e5b1a974a1aebd0e907943c4519c22c48215345a. 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/ZA34K2402158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923b18cf3ef59210b341c881300773e3c56cabba1cae707f5d2f3610d31518ad. 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/ZA34K2301678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e09d63cad1c383217e64f2dd82a68070d1f7f3216827dd101d76b0d4c6130e4. 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/ZA34K2301679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1749cdbc738888d99caca3023949e9e707991852457f768e80d1bcde7544c4be. 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/ZA34K2301680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d075e73a9367f251eedb8f88a552dbdcb4685f1aeab6d148a3cebf7d456e29. 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/ZA56E2301969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a46169386891eb8e0f7619a1fd722ae135b13bd7a5f80747f4f30691df5427. 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/ZA34K2301681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8392235f56677f28a8d3ac163fa67e0bdd17c73bb2193fe2843ec77f527a63. 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/ZA34K2301688.