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 0x1fba12cc0cb6bf70ab0e1018a2141d0e95b0ef0439f3cb64cedd1c36393fabaf. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76ef1573-5475-4c48-af41-5aecfd3119c4.json and https://artists.proofprofile.net/proofs/artist/76ef1573-5475-4c48-af41-5aecfd3119c4.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 0x8379023712dea31a68d1d2ef554e7ecf20ffad96a980103ff47f022c23bd2142. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZNWS2078459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187c9c780e192347ee088bd0a9e0fafabf6db663c0548a7bf5d5cc887f965788. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZNWS2078460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecea580c38dd184f214ef4baaa30c14ec0d186d91a9f6d118937bccd8450318. 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/QZNWS2078462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa287af13997b0075874f66e212260b6e1d72dff7a3cde30e06fbb1081c3955d6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNWS2078463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42283cfb52b61a92ade9c65da1cda751a119fde83105d156c93cc7577041dc29. 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/QZNWS2078464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf15767ca847402ef4dd6e188105e3f2b854e479168efeec66a2255c1f91352. 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/QZNWS2078465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41da5714a0709c1c4a438ca2e746c41d993fa91515c0fdb798e43f5a5d103f7. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QZNWS2078466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9831fc9e1b1466dcec7dcc1a932701d775d1f62d128482c5929c3b24667ce8. 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/USCGH2151926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c13dcdaf02851db2ffd48474a9aaf62be78a50e7bacff40efbdc7a6ac2e881. 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/USCGH2151927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132bc5f4568542c9976c5bcde6555dfa28be80aba6af008040b96ec80da1753e. 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/USCGH2151928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51782620105ff6ee222498e468b2573b4df36f82bf58f948ca18d5d4011b3a64. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/USCGH2151929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1fae3d691fe752496586199b9ce96b315ee21d8e8da6ab39535bc248107776. 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/USCGH2151930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b7e283146723c4da1fe82314cd273532aa213e8d38cae8b05c85fe8f278fc6. 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/USCGH2151931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92494be05adc31a1f55db1da024178a070c63968abf8b21a93403b9d4323670. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USCGH2151932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfc0d39d8613049c9102c76c19ee3ae7b6086594c966d62b85f4033d8f70418. 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/USCGH2151933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca6121a17d9a7213ed0f921ab322efe0aaff02a4706c87e55b5d5aa738c387d. 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/USCGH2151934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4732fa75e705799956a75bffa407085e93391f76804105e8324c4999acff316d. 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/USCGH2151935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba531d288cca311c884f671a65b3f56df2964910f4b4ba61df686c55eab19342. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZHN62406507.