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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb238815239f2fbeeb8a797a464ee60150cbe9a78840e8187edb3e635a7adb7e. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/faa1194f-2e6a-43ef-b500-891dba0cf71e.json and https://artists.proofprofile.net/proofs/artist/faa1194f-2e6a-43ef-b500-891dba0cf71e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3172e6f5fcbe6aac759dbc4cbb909182be79540f92f80236b2b93d0bfacc614e. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/ES7711445011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f40d924454434d733959aec06c9bf08298c7a928570821c897a7160ca96802. 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/FR9W11730930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52173d4bd155d649b9ac406401aa51542697d795f07262a3f0db61ecadf395b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR9W11730931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b054ef03c74734e062b93f2fe12bc7384c8dc12536b013d716ace24d911862. 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/FR9W11730932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48af996d3560d0f73b83e9c953b9ea7fb2e9b8c903d8ea10fef3e5dff2ec8406. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/FR9W11730933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecc85465dcfa996d6f4cb4e6a80efbd393abb74c1bb9992bb2259e4fa36e527. 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/FR9W11730934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d6417679b0bd912d9d69cdef87b5966c51be630d54db9e9d9f08faaf34cf78. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR9W11730935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe3e97a917235464bc719c02d2e5e9aeef9822b8a2ee3114a3449cb7da9b6ff. 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/FR9W11730936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13aee5da9a3cb9eb958a025cbfa31abb79f9a85d385d19754225c19120e6e880. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/FR9W11730937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a98d48e9586c86f09afb69a7fd9644d8a3eb16974afbf88fd2b749a5d73ded. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FR9W11730938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383f22b4f5aabb8df7d1f361846929b03d1074eb17b2c90dca7ad3f0608de9a2. 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/FR9W11730939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae390dd1c1380eb73beb4479b150be72151de336488c12f52c49734e5bfc314. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR9W11730940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173e14c048053d5937518af332eb4cc8604c9b46a60761bf76bf452d7fcabb16. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR9W11730941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56f5ae8facf4cd075e4d0da0430cb03b3d7ccbb2152e3d196ad9b16a3592af7. 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/NLRD52010027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87de6fec13379cde85ad5b5c71c1ed24ccdb0cb649a4d0c7444f3fc40229042d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FXQ722100032.
Silex and the City (Bande originale du film d'animation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94f15544e9a4d74a9bab722ccb008afda73777e2969ca6cb06868b3afb1004b. 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/TCAHE2374893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc692d2c2c76119ffa2d5ed0f5e7026992e4d74c60a07d27c8796cf50b806bd5. 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/TCAHH2335889.