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 0x5003a2f81ce8b7dca9f1a8276283a13901fa3e0c908ab14a421b61aca9849c79. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af16c423-490f-48b9-8234-4df4c0e9f656.json and https://artists.proofprofile.net/proofs/artist/af16c423-490f-48b9-8234-4df4c0e9f656.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 0x180a864f3a8c735c954ec4a7a4ca4a0a24b39fd9dd5cafdcc0d471921c2e4b04. 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/GBRKQ2366670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa080c59263d7c44812ff0d1f3781431bcb07f3019a3fd10f8e49c8384ea11153. 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/GBRKQ2366770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa453ee95ab6cc641c8208b09dce94d098ab46fb66d40e77145e61d93e5280bd4. 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/GBRKQ2338342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8cdd878771943e9083ae97face05bf65515f0e9e4a2ba4d98d2e9f66cab71e. 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/GBRKQ2366924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e96cadce496cc80d71995702b13a8d81e275a5923b1e0c62905729eacc7a8ec. 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/GBRKQ2366927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71394b47b4ae9fb8caf77b2b2d8d2bc09d8bbed6b50380c2ffebd50906565e33. 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/GBRKQ2366936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e1d27a45d1bb88a6b87e5998557e1c8d1a6825eadadafd5867fbe63ca0dac8. 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/GBRKQ2366939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493cfa1b1063a68757483b7b84984abd9edcf19671e0a00c9943e5bc04d0e931. 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/GBRKQ2366943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac49fe535fb83153307a14e38b722b716177db131a77f6b7df00f2739d6c23e4. 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/GBRKQ2319547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488fbe16aa9c313eedbce201ca7f43389a7151fd8969d8cf04c74ee7b6ac0a76. 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/GBRKQ2366946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd9d6a928e037121ca1722dd1aa864d29abfd80f7fc4ed3eeaf29ef8c504c6b. 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/GBRKQ2366952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e025384dbbc0780265cefb3266ff4179662c5e596c128093a8579bcb0115534. 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/GBRKQ2366953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e8d19b8ba3e0778480c811afd9077fa78f143333bed5f5b56b28f98cdfa750. 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/GBRKQ2366954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc224fd41b5d50e7041c614f99d21e9f696b0395f519977659e554fa01d35d29c. 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/GBRKQ2366955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69efd8c53885f68d259d28433a90af3d279a6a170be87e198aeb098512458b81. 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/GBRKQ2366956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914a63a549d70e4afe9a39f97c719cd6c6fa5cbbcd7c702c770981a1c51e5834. 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/GBRKQ2366957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32698b3cf8cb41ee28794e718ead2e6b56b0494b62d144705217ac8da5b593e9. 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/GBRKQ2366958.