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 0xecb23535840977e89b156179dad54e8d2f394c9e78baafd1ceae78ce673cd764. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44f7079f-ed2f-417c-8445-35a5ee10d1da.json and https://artists.proofprofile.net/proofs/artist/44f7079f-ed2f-417c-8445-35a5ee10d1da.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 0xc46672c71a46314cae4e3a7c770f63ac4a3b923c6d8df9166cb9b8e859114e2e. 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/DER372124102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75b8760179a3eb2b5d4c8646170d63cdc16d765522b6e2d34abecffe7670341. 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/DER372124103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd052eb254a575f78b0af6bba4f13b24eeaa308fd5ce743e6ca8455eaa88b730a. 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/DER372124104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb8727b4598f94ceead747cb69f79c932a507764242686644637311856914ca. 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/DER372124105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307cd0293302cd29c1cab71ab9f28b24e408c21dc827782f823c70190266941a. 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/DER372124106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f67c66b143e5dc79ec7c650ab7c0effc6d7b280dfaf696b09f19160e2a3f81. 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/DER372124107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa149de1505f77456c7e9e9d38531024ad443f5c3c9f77cdd20fbf2bb130152c. 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/DER372124108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295596d3cd5c6eaa3026204659912601f34dd3a9a02d7cff13f7832d167a3a89. 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/DER372124110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7cb6fcd69f6f94f95fcb8dd5153ac410fa6c17db076915719c59ffd480012d. 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/DER372124111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1813de961d7cfc85a06016fcdeb7318a393f7acfebfbcd3ccdeb57b4b7ea82a. 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/DER372124112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75b8760179a3eb2b5d4c8646170d63cdc16d765522b6e2d34abecffe7670341. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DER372124103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd052eb254a575f78b0af6bba4f13b24eeaa308fd5ce743e6ca8455eaa88b730a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DER372124104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1813de961d7cfc85a06016fcdeb7318a393f7acfebfbcd3ccdeb57b4b7ea82a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DER372124112.