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 0x6b9d5e5f504d56b3652bda1f80bf9e4f40de5efe1a0f790f41a39f626b98ec75. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/962e6a1f-9bb9-4bc2-a4d1-ddd6112a04c5.json and https://artists.proofprofile.net/proofs/artist/962e6a1f-9bb9-4bc2-a4d1-ddd6112a04c5.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 0x5035498f62853a3ab138eefbf9762556515d37fcc4bda0e54dedefe34b610fd6. 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/USA370697950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc5fe0e618e05b817ca336c7ac7f53c5ff3010d8935fef892edbdebc089033b. 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/USA370697951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269973293bace1882980398d2693defbb1049bea148514bc0abfedf7cd33242c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA370697952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14032527230f7b61ae39557509f4d1eeb0a55f8d0cd29445d7904504ca8efee1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:47:43Z), 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/USA370697953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7ca8ef4cd1d74cc1a9a8d8aa2f655c5157267aa5be0c3e5224d3c67b134f28. 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/USA370697954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f28cef9d16f6531a8bae875dd68d4d3ca3327497efe4bcf3a5adcf2636043af. 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/USA370697955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ce9779d8cb50bc78f7a4d767018f22daf36ba9075ad1f5f721a97ef4cc0adc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA370697956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa923e03f8e0153879f14df9a960d4e936b5d3088096064b9d7847a8e802d335b. 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/USA370697957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b95c315e989400753fc3e774aced29364ac599e21264a4762d29ebd2581ea70. 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/USA370697958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1eb35b88f5515e04ba0278a22745e43e101b44d6159d8cc8494d173a39b1d9. 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/USA370697959.