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 0x560e15b3b7040e6898db5b2a6a25fb2391aec72d7e7f0071c50aa983161e41e9. 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/c9cfa0e8-ba52-4d69-9f53-7766194e3f3d.json and https://artists.proofprofile.net/proofs/artist/c9cfa0e8-ba52-4d69-9f53-7766194e3f3d.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 0x949909f3d59c2f40b9a9c1e747aad4a790680390f4dde00593f716c768719748. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/COF017800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949909f3d59c2f40b9a9c1e747aad4a790680390f4dde00593f716c768719748. 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/COF017800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9443a4d2c379f5cebee98cbaa9fbe4e8f67dce18fa3b913bb524e9fdb8b14fd1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:09Z), 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/COF019501917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13681c2a8f05acd7646da01fab694af2580f49b6b15d33e1112a950528acee30. 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/COF018800735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57eac10ff5bbf1f6ef6162c9a3fa91d27bd969b705d3c984e2d10f08357103b. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/COF019501916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949909f3d59c2f40b9a9c1e747aad4a790680390f4dde00593f716c768719748. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/COF017800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d32e7bc49d05026a3403c4a5e87a8ef9a641ad59715c443becbd23c49d48573. 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/COF019503326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14538a399b46501744532a345bd3db1bc2e79a3f48050186027fe8a3b85339ea. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/COF019503332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690d39bce14a06c5e46b449d13a525336bba7ab9d9e55315674281fab26e35b3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/COF019400583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a262b472098f1140a5c701136f3783404037a3519e079af269134520f955da. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:09:10Z), 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/COF019503324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c25e22bc24e1d9df2758ff240ba8ace73dcfdd941fcf27599f2c369282402b8. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/COF019503321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa240372f958d4419a77260f5a273bee41435fcd9fcf8484bdad09ceef25707b1. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:26:19Z), 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/COF019501914.
Palenque Palenque: Champeta Criolla & Afro Roots in Colombia 1975-91
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eeee3bc09d3720f85dc337ddf97c3fad89544835769bca7e43f34412c758ae2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:15:13Z), 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/GBUQH1000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ced36176938f122bbf24aa62b9923ea5074da3629c1f0b080525bf351dacacf. 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/GBUQH1000088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480d424d12501838aa0b817bd36e30a9e8d91228c0409595292f0bf1ec8bfdd7. 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/GBUQH1000091.