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 0x4ec2a6ef9ef572b2da732d6bb695150e7e9e06d569b9c8095b7f2b122992f571. 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/b8ff8f32-c46e-4c82-b47a-d5f62603f730.json and https://artists.proofprofile.net/proofs/artist/b8ff8f32-c46e-4c82-b47a-d5f62603f730.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 0x488b94e72a920d82818d374309407af0fdcae1cafefd73057011189366517730. 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/BXBIW2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded9ec030ee1026b93c94050dcc418f0dd65f43a999b9606c27c5c243adb91bc. 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/BXBIW2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd691dc18bf9057dff3f99c2e6c94452f8c4736adfdb852f925bc723ad1a092bc. 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/BXBIW2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937feb361cd86981c5b37d04a1dd58048232d5cdf4988cfe5e4d600f3ad8c7da. 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/BXBIW2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8f54926b5345f3e30432d33a6d2ca5931e4a5f2a82adbe6cc2e36bbb812e24. 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/BXBIW2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35488a3b9cacfd5ecc03f19456574cd6e9e273b398c386bee7ee232f061677fc. 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/BXBIW2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498eee391b162755ecfee68c760d6f333848a94a2f9ddd329ff95e3ea49bf4bf. 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/BXBIW2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936661b99bbf3008915fb2c3becee79c3eabbe242c9cda417853494dce3eb589. 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/BXBIW2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f80df075101f54f7bec96f8271e5ff4060a172000129fd6f922d0bf427b827. 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/BXBIW2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488b94e72a920d82818d374309407af0fdcae1cafefd73057011189366517730. 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/BXBIW2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded9ec030ee1026b93c94050dcc418f0dd65f43a999b9606c27c5c243adb91bc. 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/BXBIW2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3cac60b9279e95f017f696d4a665e8ad14fb8d341c4c869a2b46dd3c493b60. 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/BXBIW2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d4573a59bf1d3c0f00fd0e123d639b4440bab99a3a9d87c6806f2615cd2512. 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/BXBIW2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488b94e72a920d82818d374309407af0fdcae1cafefd73057011189366517730. 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/BXBIW2400004.