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 0x87ce7835974fc6f2ab84db4c6024f29e9d1637441a74f6c36f964b80228a39be. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a421faf-a037-44e6-aa0e-4d8dc0cf9059.json and https://artists.proofprofile.net/proofs/artist/6a421faf-a037-44e6-aa0e-4d8dc0cf9059.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 0xd4191045366706536d81715b611d296f10748c1206917192e7e17c6f205e5058. 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/HUA792300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf581fbf9571f656501822e2885e038d7128fe234b3a9e82c201619f0f307bbb1. 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/HUA792300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f8ddb86f894fe41023254bc2a51b69028cb271ca73abdfe612058700aabec3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HUA792300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ca3efae08972dee89f8a2964d54dc51f8dc366c98f21b3c3e11f3fd54a0def. 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/HUA792300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67e7b876f8ee086d5e58128282201793652b511c0962b33eb521d134e49da00. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HUA792300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f81907a78e9ea92980d9bb7fed010a10b51cc704d25bc532021ff5a8c185093. 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/HUA792200167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138c8d518b3f9347841ec55c81a342c9632870cc4d2700c7cd2238e97a8e84a9. 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/HUA792300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdf9337ab055ca36933335a06d65ad9b140a852be75ef8357258868cc25bf4b. 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/HUA792300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a279b8302146837db398ed7b6effec6909b0268d0d293eedfed382ee2876709. 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/HUA792300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c87c1c1c545981ef33228eacba63d4a79ee19e86284079d5a625a274719107. 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/HUA792300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5310873d9961f93e5968e3508c2d9c3e12bd83d17f868df91b7f7e2252106d. 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/HUA792300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfac9b9358746210709eea51e414c467d7f8392510456c063bef02f5f07669e7. 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/HUA792400146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e439b0867b729345d3e56e0fdb129615c64159429aa654789a715b011ee5353. 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/HUA792400136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44f3bf45bf4421840942656eeca414bf02ca7913f9e9ed18b86eddaf89f776a. 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/HUA792300182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f81907a78e9ea92980d9bb7fed010a10b51cc704d25bc532021ff5a8c185093. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/HUA792200167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf58bf52361c382cf3f9a1bec2893cec2152caf54481fbac66da192b11f3c16b. 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/HUA792200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf69955c97ba08e092b26a78fe6a2d4be29d49b5f6feb7fb70298048f757220c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWX2069115.