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 0x52c62865b50ff54c907f63016f58dd9c1836fd039589fb4281ac2fe84b92528d. 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/850c9f55-e2c4-4fa0-8dd2-af807bd157b0.json and https://artists.proofprofile.net/proofs/artist/850c9f55-e2c4-4fa0-8dd2-af807bd157b0.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 0xfc0c856fdc038ff4c2c9cf7c32aba324f576d1182cbc46c16418f649e87f48dd. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:24:43Z), 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/DGA052054038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f36c90db75daf4f30554eb6cf83ba75997e4caee100c6d0abc801f853af9a34. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:33:16Z), 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/DGA052054043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9b4fabd7ac48b3184171ac1c587b526b3d77d51a7ef62d64035b5569ffaf56. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DGA052054044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5441149458b3e31789004a443e5f960e61d0745d47ff6406dd057199438fa51. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA052054048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5ff0f26314426c747c4d376dda8ba2694041f7d6cb350de531364fb61b9f90. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DGA052054049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b17b883d377ade7603851cf2448188134d3f25d2decd485988c2ee4f73549d. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:09:57Z), 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/DGA052072828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ac68e0659595b092912925bec9fefef04a9aa460e59935098ea63fce25359d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DGA052072831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0ce5822fda6548d3baba2c3de70c9f4e58a4e36e002defde761f7c751c9ecd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA052072834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e6b5be4dd9be3f0ede8558dacdad954dda049c52efb418beed5e1b10c056e6. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/DGA052072836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64415a5d94dff79a8af8cc68a1ff1995971187ee82664a88491dad0a5897d87. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DGA052072840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98bb3ac79e278b2d27f8328e6c8f5a8a0de8c87533158e2ca541fdee413a139. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:30:50Z), 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/FRX872038728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780c7beebd6d4b5f1e68be25408804ba30d031d826a9e646dfc69ab2ed4f66eb. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/FRX872038729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236f17f530d2200f83621cd922f7e1dd0911865cd2e5985566c965f628a74345. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRX872038730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bba2c8a4046908a819aa4a40886655a71b609d65711447774f69f52ae830ea. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:48:36Z), 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/FRX872038731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6137fdd084b7ae932d5fc972ba7336a1ad5a4218705193b1ee5ed4a4a9e395d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:12:02Z), 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/FRX872038732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbdc728ce42c5bdde4276b6b339edf7d135e623e9e64ef826fdc303e19bc111. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX872038734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80350b0b925090c9789e5a1e757e128135064d025ecdcd38a22d480ad42595b9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX872038735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e90102a3d32ac3547224201ad4990cf888598c155b8c522de8a1095067dab5b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DGA0Q2419382.