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 0x9b265fbe3c6fcda5e559a236328f4d661af5fc2197e3261279c71b3f9a0caae1. 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/446a6f37-b84f-4d61-b261-d59483c5f3a5.json and https://artists.proofprofile.net/proofs/artist/446a6f37-b84f-4d61-b261-d59483c5f3a5.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 0x35d5da49b92d4eb3f2f5542a0202c128ddc0434985397406809377242d46c933. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:02Z), 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/ROROT2303360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3620ce85bee4a7ab85a8558b9bd5c44084bf8c598b50ddb286949dc3d85e9d5. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:54:43Z), 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/ROROT2501300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bbb653df1bfc002f2153ad594afe1e07fd9599a0e87507af89907ee80c3b5a. 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/ROROT2400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492e5ea441dfa2b2e1c0ae89a278a905b4a68a22a794997e22f7bd713bfd5e59. 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/ROROT2305250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc176851782c43a001eb89ad0fa52e137fb315960110a9f3957ca6080278243f0. 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/ROROT2304940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f438345127a2055073310aad0efc79940e8e2c49ae38ab20bf427d905f8a93. 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/ROROT2304610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8815926ffbf406338ac16828acd97fb5e81ea32c0e3d660420ce47bdefd3a6b6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ROROT2304220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db58edd01ff265b49ae8316c916e9824a8f1e86044c36134ef533330fb3d093. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ROROT2302580.