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 0xd1d8c84f53f0da9ae16021440e8de8d6aa8da58d174f280d670ee7e25965f306. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffd2749c-b479-4e6e-a7a1-6fe5513d2e6a.json and https://artists.proofprofile.net/proofs/artist/ffd2749c-b479-4e6e-a7a1-6fe5513d2e6a.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 0x7d4a8f19076ed8f9a57dba4ec709130d33732d9066f9d929724cd6a2e509a50a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/IDAC51200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22db04c050ed1d2b73c9bce24d3b310dd5120be036c822e89c1d04ed1bbbc954. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/IDAC51300184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7b34f0401d748c0f216401b4d68a5f975256bc34d0e1e15d70d3280d2cc77c. 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/IDAC51300185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b30eac4298c2983cb68a1ea085808ec897ff31ba9dadc44a3b827db9db4897d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IDAC51500079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01bd87f984a95db7aa288ab40d1160fe2a53264e4abf47b28515a54aea5073a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/IDAC51500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ab43921ba9fcfcb8648dd77f80dc9c49d942cdfe6808a4e521222491827795. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/IDAC51500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a8f8386ea592742561cb9d404c846460376a8fb901662c6ba2ab0058ee0a51. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IDAC51500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6371fdda94f7c583eeb33aeccd51d9e57636380fe543b8abbf8b84827c1d9ad2. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:35:24Z), 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/IDAC51500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45886d8c60ccec55ebb0b81ad8efd3876445cb165abe99f17ee9280df35a56e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T09:11:11Z), 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/IDAC51500085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a75c68015571f54e8681a66e383f80776090a949fd23e7344ae26af13ae110. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/IDAC51500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cbc2ca0abc0997dd3513e35e5f00bf474e4ca0788ec40fcaebea9574d0f9f4. 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/IDAC51500087.