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 0x498cc8a59d24aa118d4d911f287774bdc36bed7c4da21c57e162e873530bab49. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f076045-bcf0-4259-97a7-0eadae7f3f18.json and https://artists.proofprofile.net/proofs/artist/8f076045-bcf0-4259-97a7-0eadae7f3f18.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 0xd0d89c680a403a061dbca1eae24d56f29cbe86cd8d3815c62c560651423b287d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJG2556685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cd8a4aa452ac62016ce5f9ecf99a4a81f4e9039eea58cb297d2a12175803f8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:08:44Z), 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/TCAJG2556696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91958bbe18bfa3fca5e7aac5a5ef1af86a314ff0e88be2dbf7da5d03715f6d2. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAJG2556697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153598004b0c200d7bf06d441a31221131ce6c5ea05d5841a8c5b2c456b7d9d0. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/TCAJG2556711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23dbb3b310c01499c9b158845a36b87d7cdcd3032ccab70a5379f3da1091ae6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:04:06Z), 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/TCAJG2556714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b26234e6d451ece31082f175c67c2272070ce58b653396b245f7b191257cb0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJG2556724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e19823173443c92eb74b585c656d55a244f20400afedc77540a127f2740ad5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:05:24Z), 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/TCAJG2556730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2c1598540a3a27ce9155a880b924615f8efdc3858e9c9dec6210b5e0f3a5e1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:49:46Z), 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/TCAJG2556733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf234e315c023846a5e68bca4ae7d5e050d213c02fdcf218fa2df5bfaeb848299. 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/TCAJG2556734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b499bb30644e4d017852990e1d9f7fca1b0881da05781291c1b1dd40a7ee75d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:12Z), 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/TCAJG2556737.