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 0x39c3d31334a0082ffee92b8363b517a09b5c160a97030bf177a1c9c6ee03b7b1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1de29cd-1410-419a-b7fd-0b95d68344f2.json and https://artists.proofprofile.net/proofs/artist/a1de29cd-1410-419a-b7fd-0b95d68344f2.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 0xce01d9ce98cdb0cb27afc94658d32c4a8b1b93ef1bc2986b2b1a8b88ebc5ddb0. 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/BRRGE2200850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e4175e96f7e515f2ee7abbfd84684e9e52e4a7ae7672cfbb7e536f22ae17e5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRRGE2200858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28df351167d6bd9ecf3f5011fbf7023847183d708488213de9dea4807dd4811. 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/BRRGE2200852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8a40b49da949880234722ccd9d47cdeafbe035526b9fe6e297f3f017a2b2f9. 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/BRRGE2200848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53cd82dc7a3c49b04139e6b555fabadbaa3a8209a3ed4e706ec09f968ea6901. 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/BRRGE2200342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91a7ddcc274a3fa8a4797bbf419e795ccf2f58ca54e3ff2f5d89674f62f8f2f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRRGE2200862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9baf16ea28af38ead36bd45ce1302a792b0a723c543e5ff9da14acec45b322. 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/BRRGE2200860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9baf16ea28af38ead36bd45ce1302a792b0a723c543e5ff9da14acec45b322. 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/BRRGE2200860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4ed53856ab7a9012696d965ef51a7c7a72e862fd56182669caad37dec3cb18. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BCQAB2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e500e4ab218a80f1c098f698edca77fd0f12253028965c402b3186d90205e5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCQAB2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5846bd901bfcee233fd9c81f53446b5705115b52059da96364d0dff2a7e48ee. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCQAB2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4ed53856ab7a9012696d965ef51a7c7a72e862fd56182669caad37dec3cb18. 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/BCQAB2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5e1de2d61d68d11f2824d92a4f957792aa5ac9665d98da3f1c4db22c775da3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCUHX2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc66e636a79a508f17fca1ade19f9a667b814c88e1be595168eae23a61dbed00. 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/BCQAB2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8819373e2050918e572108f4f3601cabf1fda6474eddce50ab3f68fe1035cac6. 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/BCQAB2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5e1de2d61d68d11f2824d92a4f957792aa5ac9665d98da3f1c4db22c775da3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BCUHX2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997f873f318c8d76b416b27b4925878b268d4f4118c482a1d9b72060829eee04. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BCUHX2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321f39d5cd5b00c9711d25f7cfdb72c1d9e2b4410be08b2518957d0edbaaab75. 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/BCUHX2200003.