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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ba36bb34f3b619d9ef11c8e5f60ff79190f5537e9982065a8286cd554cf2ef. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc36cd90-fefc-4fcb-93c6-a63564fbe855.json and https://artists.proofprofile.net/proofs/artist/bc36cd90-fefc-4fcb-93c6-a63564fbe855.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137b9a5f776df887566bbea6d9741ef3d30c304ec0889dc7f4c0a120b203257d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BXRNV1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ca0f700516682bb8e6b0596753ebda829477b849d64ea86610bfe74b514e30. 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/BXRNV2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af268395b25eaab19be16c9ef697b4cdd057b3c5c3b695e1c4efb7fc882d677. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BXRNV2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206c6c3e19607a1c3f66857dd458b56577dac21bfd1c17a2a6648cf6f09dc6e0. 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/BXRNV2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec82cea950128a1e586ac597d4da51ff57f8ee01d883e33e7d090b65196b3b0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXRNV2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870bc41b97e95f9e8eb310ceef3ba96b42e7a9883f570d825929d84161e012c8. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BXRNV2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93019303f8006020b61fa7d7008492c39c29cb179c94e7ef010c5dcff6c72202. 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/BXRNV2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6525b7ec42588bcb14aa76161e197db3542bcc1b5640050e6fa216ccd05c43b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BXRNV2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47203da281e1c0da07d32d0cb527fc997db5d952834f10b0b4a5953dc568b8c5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BXRNV2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2a1f91e361903561fe91f874a3d83635cc9858e35f5e0778f3559e0b679418. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BXRNV2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e146d54fe178a875cc14edfcdc0da6538c771e2a24f39fed791d2981f44b3e2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BXRNV2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc946d779fd667488e607ffa9498efc4f76cbb5f4c4e874d9f43d0a58d5df5bc4. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/BXRNV2400048.