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 0xb1ab6208556902d11ebcc511dda0ce48823ccac06592f870117e08f4c8acbb96. 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/cc85ed4c-3b32-48e8-bbfd-7b5dac498142.json and https://artists.proofprofile.net/proofs/artist/cc85ed4c-3b32-48e8-bbfd-7b5dac498142.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 0xc55d039046e7d21008088e790dea381f8051baef3edb7496ccb289e78d9d7893. 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/COSO10600486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262986af276b51ed2eb80307747e0198781e5f90fb4150332d038240661bfd2c. 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/COSO10600483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc499a747411022038198da5987243762e3e9600f100ecda9b34bb5c38e85589c. 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/COSO10600479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c46fae2c1737a10f390304d59ece338677453a3179cb0f733a9457ec3a0bfe. 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/COSO10600485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29824beb35e63d545374287846e524bde23cc7838754c71819647ea3df5b4a0c. 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/COSO10600490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4a30cc89393c82fffc132f93499eb2bfeb2494c8a338b513e6dc397de2d60d. 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/COSO10600488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe934622354946dc4e3172e7df3d438eb15948178fab4ec62bc7b6734329b2ba0. 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/COSO10600491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d43c716553113c669f05a5138c21f7650b9f1fa722fd37fd548ebb9b685a6a. 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/COSO10600487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dfcd9d2ef46c7fa76ae5cc7f7529999afabbd6c2c4589be4a6167c4ac965c6. 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/COSO10600481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f910245d2856ceafb116f14db6a014e5f45f9fb4c8b6c7e22921e9fcbb287d. 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/COSO10600484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98188939ba780ff00a922dfaefcc75e716013c40c4fd9ad31cbadc357fb0f881. 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/COSO10600489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b8b3ea5d142bf9346367090cd19056bac66bd139e6fc9f29a97d104f37bff3. 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/COSO10801043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac46ba054cf6c4cbb485d35728e134b1278a29c79bce7cdc5832f027bea53e82. 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/COSO10801052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99db19f32bc54fd7cb3a6a7db73021195b9cc8b4ba2bb589563227ee7fe201cc. 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/COSO10801045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ad877c35beaa5a2f3df9801b2d4b5ac4b8650f58953d4fcc4c358e93a14871. 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/COSO10801049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40d8ccf296f40540596b28347329af6ded21e5b954d665ea7caef1647a386c8. 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/COSO10801044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381a78bc20ce96d293d105496cf710147a2f09277b95b4e160696f3236d7bdf3. 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/COSO10801051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efd38d5b655309770a50406e9acf9a4c9d4c3a8cd67df2ff7987ffa511c8bad. 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/COSO10801054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a49af455c66dfd019063fb3ef0b7080d8fd5a5b71809a6719bb3cba0399133. 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/COSO10801041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b51e9c9ebf6e375664871720a2320324bb44de256eafbfd20d3071a98614da. 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/COSO10801042.