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 0x737c6cb6b8950e656688fb4eb3f38258a5936fb1eaf40bbe17a48611d4e5875e. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c412fe2-143c-4d9f-8ea6-c86f9db6e1dc.json and https://artists.proofprofile.net/proofs/artist/6c412fe2-143c-4d9f-8ea6-c86f9db6e1dc.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 0xf37553731dfd6c6ea6c9ae37629c33be9e36311d481a7a669e48062ba37d0bb0. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/TCAJJ2507833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513032f6d2a2711e66a228e48a1cacd0b9e44d67097df1b8749d3ccf6065e720. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/TCAJJ2507844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860bdbcdb2d280ff8602048130c413520c9803cae900e6cf5af1c2a9d3dba195. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJJ2507846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5de296d13b0cfb9c825dc4d884ce7138c37f6a8bcd01de2aba9f98241212b7b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAJJ2507849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e40291c6a60d674fab92907eceb644914e2558ffeb6e99fc2697cd8c8f8036. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAJJ2507857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113f8fe8c0a281caf6b5ca3217991e4d9cd56d704c92534a6f3f71e45751fb21. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAJK2507863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f4102bd1197f46bb957b59862a1a8ec987cf70e074513f235ca1667c9ca8b5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJJ2507917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174c2b887a4851ee08d8abbcdbf2abbfcf2767cdf1a9ba6b7970b7ebf80efec3. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/TCAJJ2507923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56db3e4ceadae4ec9d5405376adf600e0ea35d0294bde154fedff5956a945e01. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:58:34Z), 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/TCAJJ2507927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f23e41626833b00cf8c88d683d0061db62d9b48abce095cb35475352616ed3c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAJJ2507929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f452c6ffab4aadb288e4e9998b61605513006444ad0878c3f462f5b16e9024b. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/TCAJJ2507944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc976a58f8b491884bbc047304d523f9607946e86362defcc54e5601cb299ad3f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAJJ2507951.