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 0x76b3104b32d4338400d9fe05997b3ff94f9fc6425696c0cd59e954cb559632ea. 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/544b374c-c6bc-438e-9569-79585851e6df.json and https://artists.proofprofile.net/proofs/artist/544b374c-c6bc-438e-9569-79585851e6df.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 0x55fc4b6ed0062adb8412dc46630912fe2174d82fb676a6ba428d35ada434c719. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/PEIF21705025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5836b74ebfbaa613e152b5fd22bdab248845109ef89187e629ee37258ee856a3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PEIF21705027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3edb5af886f95ea2f82105e6d84979dd3e6f85760911518e05c695cd92c985. 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/PEIF21705032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5303729d46f6caa64415432dddaca786bc695498e9bc529061f34380397eae35. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PEIF21705034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e4d17bf58ecf6f2c39bc72ae12c2bc3bee9c8a8adfcb2b2783e90a62469c0d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/PEIF21705035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4165e6a672423e0e80561e42be063dac270731ffc7ee83c558d6ce032c398b93. 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/PEIF21705037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bceaa5fba4150e46f21a4b0db6cc02bf8df0777334e504c19bed442bbe603f. 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/PEIF21705038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d7e9847f709a81ecbb5c636c9cc8d9061237c4f040a29c6ef6d446cf6c9b85. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:23:08Z), 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/PEIF21705039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5bf4c880b048acc163d06e477d368a8f4ee08e1c416614bcadcaa869898338. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/PEIFP1901002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e08e3d54b63a51ab28ea6a7918dc1cf41d74d41ef65cecee5efa98eecefc77. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PEIFP1901003.