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 0xc48be0d0e6e999b492e93b93d58be751972b6ab816c7454136bde690c2f14684. 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/25decf82-c81e-4c4c-bff6-07c009edb7d0.json and https://artists.proofprofile.net/proofs/artist/25decf82-c81e-4c4c-bff6-07c009edb7d0.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 0x19a85da016ccfa68cfd7daebba4ea5653139870844aad64963dffcf9e068b88d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN42044802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ddfd48b940d2e54e9b7ed2c2716cf078b550c76addd39dfc97f74cc6b74112. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZNWZ2049353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9175524b322e6af2e68695c995f8dbb294196e0fd7205d82748d3339edc77f0b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/UST8K1659530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c1e7f874b6a2e9fcb0c2eae46357ce1dbf9f1f8323fc29194b2fdd10808e1b. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/UST8K1690242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06026b37052fab067ff8385e6a308878b48a1f3348c96fc7130082db6eab306. 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/QZHNC2189312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fde9bcb3cebebdb94148e69709cf08ac62a0e10643b92f4698beba419f16f0c. 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/QZHN92003808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acc3e96c9e64011edf7f0bcdfc24eaa6c47b046f9196a625a3a07bb5ca80635. 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/QZES92052279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9175524b322e6af2e68695c995f8dbb294196e0fd7205d82748d3339edc77f0b. 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/UST8K1659530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c1e7f874b6a2e9fcb0c2eae46357ce1dbf9f1f8323fc29194b2fdd10808e1b. 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/UST8K1690242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9175524b322e6af2e68695c995f8dbb294196e0fd7205d82748d3339edc77f0b. 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/UST8K1659530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c1e7f874b6a2e9fcb0c2eae46357ce1dbf9f1f8323fc29194b2fdd10808e1b. 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/UST8K1690242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9175524b322e6af2e68695c995f8dbb294196e0fd7205d82748d3339edc77f0b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:53:29Z), 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/UST8K1659530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c1e7f874b6a2e9fcb0c2eae46357ce1dbf9f1f8323fc29194b2fdd10808e1b. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/UST8K1690242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9175524b322e6af2e68695c995f8dbb294196e0fd7205d82748d3339edc77f0b. 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/UST8K1659530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c1e7f874b6a2e9fcb0c2eae46357ce1dbf9f1f8323fc29194b2fdd10808e1b. 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/UST8K1690242.