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 0x30a327ed8329b2619bc63e051f671b8831c1bb03851a8107e41580e0ba544fc4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91061591-2e33-42f1-9029-1fc14fd48bbb.json and https://artists.proofprofile.net/proofs/artist/91061591-2e33-42f1-9029-1fc14fd48bbb.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 0x1e9dc66f1d1572868c62c51bb643684c88e2e34ef239bd9894349ccd51cdb2c9. 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/DEG932203176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861c62dfe3401473788babc2c100ce5aefba7552964b12d3a8556b55a77927a8. 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/DEG932203177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b3eb06e0b876ca8872fc71bbf8691a6d1254ec07696c0e55b14af52b8876ea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEG932203178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c5a65779e81c8f044e2cfbd83ea0e5bdbf59271c1d14cbc38fb3e2f94a7a1b. 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/DEG932203179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e00e336f1706c2fbec6bfa2bad09e3f6e56d25f7462e694238a34e44d5cc569. 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/DEG932203180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861c62dfe3401473788babc2c100ce5aefba7552964b12d3a8556b55a77927a8. 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/DEG932203177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b3eb06e0b876ca8872fc71bbf8691a6d1254ec07696c0e55b14af52b8876ea. 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/DEG932203178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245b6902c8a9bdb885889dec483c92fb1fbc493d69ae9cbb26f6f80e5ff25e9a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX872113529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3801f30484333b93809309013d87ed06bc04289d951855b4fe6f01b6a1713a. 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/GBRYX2100321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb09443a3edf5338ee8f03c2980fa1b13a0f4b96d52b760ef2b6b4aa824ea77c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DECY52101259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8572ceab6e1fbdbabaf41912e23e42ad7a4beb99dc01878f245fe41326103a6d. 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/DECY52101262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cadd553e3d509074ffb2591bd1c54989a304dca15240da6ef083a875a171553. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DECY52101263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d55a994c4130e155784d1e1f7cbc6e79896dc68a1f6d541136a366174264c5b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBRYX2000280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8220629b358d7c4cb748d2fd7b5f160e289d34e3318e93ac41eed4e40d0c5cd1. 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/GBRYX2000281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a983980decf228691d4dd00f33acf519e6b64febd8a6bfa0d8935e992717d1. 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/GBRYX2000283.