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 0x622b45125304493a087294e8583b871e138878e14135bfc7c5d33c1d7bc41bea. 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/11fde962-8f55-4d62-bd71-4e1454d9618a.json and https://artists.proofprofile.net/proofs/artist/11fde962-8f55-4d62-bd71-4e1454d9618a.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 0xef47cf5c6d62a97088f626a5fd84d91e35ea205874b6681ce44782cee8ab80a3. 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/USHM21628666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d73d5d4a961d546480df98f7ec173b198e366b4c2f042e7060d8bc136c18dd6. 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/USHM21628667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98a571cee191b8a8b3c819b2aa7e0041a726b5c7f889546ade320c76b1bed38. 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/USHM21628668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb812b90f9782890e616055e1af9a03edc0f52d1cbf5c85e4410fe0ead6614624. 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/USHM21628669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc1a177ea950918aa9cccadb508bf95f620e9a71f4aebea91563fe5fbe3aa51. 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/USHM21628670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663c7ac62f0f464f9de52aff5e141972149ea68fd796d2b974b37402d21827b0. 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/USHM21628671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c97ff29cdda8afcf9b0c1913bbcbf587c7901d075f0b88a5d3be1c826bd4e9. 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/USHM21628672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6492b0166c68d7584ef295a87ee6b03dac65928ff5117c1620f0bb356cdd71. 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/USHM21628673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190867c0d1501f217666acf616ea1315d165177cfb450496a097c9c65cd391c2. 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/USHM21628674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3d2978588e29abc3d5ed1cad94897653e101bc3a1034f1c8b5e3d7174cccaf. 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/USHM21628675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c3a18b79a4b07572c3a806af2b80107bc3734d6d5c81f998e6509948890a56. 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/USHM21628676.