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 0x1fb8f66a7d8bb8df7b455bcfa252a5c3708631f8b378a5c29303dff71f5f8504. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa235901-3484-43a7-b4b6-80b9a1d1e90c.json and https://artists.proofprofile.net/proofs/artist/fa235901-3484-43a7-b4b6-80b9a1d1e90c.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 0x4d623c8d40a8412874f922ed33554fa25293dccd1195f571431d5f571ef1fa38. 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/HKJ962117121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8718559d2bdfc3b18194397434f8f1d685588064ce9b5afee3bdb9c164f0487. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HKJ962117122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e0cd3caa667876426724fd3bf726668f0528742852d7b4e8dc36e5f9048e4d. 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/HKJ962118610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb827c93648959ecd32c8d8d39388c52c9095d8f1ad6af6337b7547f64203353. 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/HKJ962118612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91724a1b7abfdcb9aafe4620572ac04b4c992aa9f3be628f675bea8c9e0e09e0. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/HKJ962118608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795040151c7b2925dbf7c944c31d2e542418ccd2f386f5de031098ea58a29f38. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HKJ962118613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6495a4555d9fd5fb7e3dd2d3133f07b551a6b5719468fa38ca7888d6b322fcc. 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/HKJ962418622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fc94196656d029b66f2f5f56e3901d079bfbf6f31a22e85a419509a593dc38. 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/HKJ962318620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3f28ff6eba20eaa6185bda8d06fecacd275a6e75f4902c82198f69582df3da. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/HKJ962318619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6fc4c55fe0491a02983c2b5a05a3e7790f00c3e4d7103a103b9f0e11229932. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/HKJ962218616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd7bca0b81218063ce4a927cf7d139927f5f6af275f8a70c073c6b5a1964b30. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:21:56Z), 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/HKJ962218614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a9d1f4f75512da161494eaf9eed33c9a7aa7b6558ea478deed2c73cba3945a. 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/HKJ962118606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135e7e85ef99b8c2a53029b5ec1f455c50ebec622c0c7c37de065f832685c94b. 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/HKJ962118605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bbae0a38f6d522d3da26061885bcd89cdde92897715495a673ae7ebec52bf4. 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/HKJ962002901.