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 0xb6e76eddf08b3bf87f6ceddcf40e3c3bc415a83859bbce2e2f357f200d123b1a. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef819385-8c88-4a16-8ba6-09ccb1f373f0.json and https://artists.proofprofile.net/proofs/artist/ef819385-8c88-4a16-8ba6-09ccb1f373f0.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 0x5a36d0c7f763d6dddf2e192d0087b368912efa772748a011ded239cb992c5e98. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/FR2X42111096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d100f42e7a8d013e12a808a1d0f53a9ecf32e22e77f3c0093a411dea61dc17. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:08:38Z), 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/FR2X42111097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9dc3fbeb00b8e1d8cf08d491e6a7268a8ee399bcfc3ef54432105e57d2b257. 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/NLZ8C2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f6a92c5b24cce57d115d37e8503ed26f400ea1cbfeaa74c451c86219822d7e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/NLZ8C2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc040ee90ed015efe518d6a3003837e262398fd648137eb84be7cc694e89513d8. 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/NLZ8C2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af2c9919e21cede45ba7c06047189fa8ea3996f92b7440927960023c7564908. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLZ8C2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cea3b15e76e1f7376b8f2f65254c3ae7e3ab6fc6e8a9bde3bd1fe1a81ba1a41. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/NLZ8C2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fc3519d6fff83035e5613a0913ae1ddb8bc8f50e77fefae8dfd16fee63fc4c. 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/NLZ8C2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052045859873d299f3d61a6c5a2d0fc595135e8507ad0a1b43dafddd155064a9. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:28:14Z), 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/NLZ8C2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b61b50d4096e4b75f3483067dff1750ef7bb57e5756901b469f40eff5b776e. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:24:40Z), 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/NLZ8C2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639e975da559a4c1fa580b4cde4ae013d32f66ba2e200dba5f5473ffd271bcb4. 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/BEIX82500652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027290cebc8ad650acfc6f86ec88d5ca8f56496af6ca809327ec90568f66c599. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/BEIX82500653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abfcd3c081062d957d29bc34c7afb7a67804629089458d9b2664b0ba4b3ea46. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BEIX82500654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0720454fa7bd2f35e5b79f2c3ab26802891c7136bd3ddefb4d7eef119b192ae1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BEIX82500655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348ca3a09649c07f003e3ea9c225edc69cc134484fdc3b5fd664abc322006143. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BEIX82500656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8000e45fae791c077ed49beaf9d610e72109ebadb8beef4e14cdbcced54b728. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BEIX82500657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40557e29c20d2c32fd5a2e3df675960055dea4ef4f6b0e96a4c2429f0212c9be. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BEIX82500658.