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 0x6be2e40bf074590fba1cbd75b14a17fc418c792c643a03ba96941bc97342c317. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7455150-5ed3-4c90-98df-1747b98a6285.json and https://artists.proofprofile.net/proofs/artist/d7455150-5ed3-4c90-98df-1747b98a6285.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 0x9be15e0d21fa2bedb5bd98f67dd7d6674ad8d673be4edf0880a3ca0e299dbcb5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH6541953092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f725871e52c6df7cd090c347f918b6c7165929d524537b6619e942a650372b8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL1LE2001603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843ce836a6f76183d59e026a36524e3222a0245371e7302cb9c6b3a4a09981d3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USANG2276899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a5084ffa7fc661388a29a58c2cd23c52419e889d4add85e73ec4033f5ffc0e. 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/US3DF2412719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4014f41f6c640f3164b660684a6c59dbf6a6b58198221c00b584137ccc12cd. 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/FRX202453743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f70a797f5c7637ac66e9b41caf741426e9dec7ace71bdd76dbf5040989cea87. 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/DGA062494147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805cba6369717ba3cfbc38e03fdc222e1a987c2899eb9b2ad6fc3e024ceced95. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM3DF2404011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dc806a16acfb2f1e8674d5e707444624447cc108a3c94c3c5de31a5585326b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX282510880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f0b35fd6f43d49185666db61c1200d7996dd367e521f72d0ee6f3ccbbda2e2. 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/GBLV62023514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6f5a4b096915592f23528d258cf46279fdb5e37d69e90ea0d7f9ed985d64d8. 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/NL1LE2302974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3381588c910d1de3a3b69ef713f202946d96c07ec974e1bf051e57d5338bf964. 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/US3DF2272012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292b99b830fed86667589d3f684b4c018156c67f969431fc740d8f0113e3995e. 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/NL1LE2302867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d99399803e3402ac831e69e8e1113c0de3fb700f952e569590c7069ae476e5c. 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/QM3DF2284927.