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 0xd2f6951ba526740f3fc8e18a37c98877855c89333a94255e3ad26be085fbc407. 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/38d56a3c-d407-45da-a2d1-a2ee02d19c62.json and https://artists.proofprofile.net/proofs/artist/38d56a3c-d407-45da-a2d1-a2ee02d19c62.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 0xbe337201c787715debc0b3d601a371de962533a1ffde9f16394cc288143f392d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:10:17Z), 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/BRRGE2102399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3693cd23e764034bf78bee478a29d3924ed7d65b9c3a13337c388e7f6db24a9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:13:58Z), 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/BCV232300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b6b8d40388aa609328e704794abe091c3832d42663aad8317b360a6aa89aa1. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/BCV232300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddee6ef2ea4cdc02bfd6f2bc7a8d19c3f0a2cba99eb1ae3652620738f32f155. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BCV232300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2881dfe12e0e46bb55a73b08586a56865610683c133e69fc09396066f005e2da. 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/BCV232300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658ed3d68a45f7a89df0d043ff0f1677697aedac10f7b62587a1c32e43a63c87. 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/BCV232400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b9dbfeb43dd5cf043827ad39a94c367672653a21dae43868267fc5c7e7ad79. 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/FR2X42542372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a03b75e44359833bb8b0dc982e2f0d51405c902c72cf78aec5e8ffb471d2a5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR2X42542374.