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 0x1346cebfc1733e6c9a3e8cd08d75d3c8ef1d3392497adf3a9800aa99d14387e8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4dd2be4c-7d6f-4e72-82a4-a7a6614f7667.json and https://artists.proofprofile.net/proofs/artist/4dd2be4c-7d6f-4e72-82a4-a7a6614f7667.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 0xb6f5e9f64f4ab49bf4029e0a669e5e1049bec8f3704ab89cd3105b2ef2367e91. 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/GBKPL1562859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebb05b83a60a011b33382feab1a543cad97fb89dc2c33e87dcf8acc6236e132. 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/GBKPL1562862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277533bcda3c47314b75579ec9368d25f4ffdebdeff966be8dd40087de2fa5d0. 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/GBKPL1562857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a568a871a7fe7cb039f5c9256e2644929b1cecad1a4ce72cf8df14365dae84. 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/GBKPL1562863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739ef3c15d444ef6f8c22bf3d56100bdafb01c6f5edffc45f8c7e086f40d8f41. 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/GBKPL1562868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571533cec0a03c5e7f7efac16609dd00d618e3f12fbe8fa14c01594a38bcb5bc. 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/GBKPL1562869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d15cee4c7b055909b22f9c73322835a5416369be46c312ec7255adc7ab3e12. 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/GBKPL1562858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e305322495786cf1872e49971a821423f45b134a3242629db4ad41f1471ea7e. 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/GBKPL1562864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c6f3cfbd6ebc4cc3468687e7fabc5ac6f019c3b5a7b937ef3d2bfd2302eafa. 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/GBKPL1562865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0aa9476a5c17cde0d077f0bfab4ec983c48b28c35e25c8bf44b914d558383ca. 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/GBKPL1562870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a4e19e8c3f817468718765944694d9a31fc4c3d055b94a860b258196b3907b. 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/GBKPL1562860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe737156bfb67634105d5104633ca3db5f94ab5e87c88f30a718095327fac9179. 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/GBKPL1562866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffa57fbaf40a0a829518f99a62ef0b719d9d5f83cb00c6188c9cbcf5b6151ea. 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/GBKPL1562861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a52894e03608fd71860c2679ee6a85d407d62cdb48bac1ae5892561c8dcf05. 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/GBKPL1562867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ff86d0b55080e6fa2604ec93451aff9d52fdb46cc3a3e7cf2dca5c838bbb78. 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/GBHMU0900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ff86d0b55080e6fa2604ec93451aff9d52fdb46cc3a3e7cf2dca5c838bbb78. 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/GBHMU0900007.