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 0xbbc46ccb8fc4129583738a3e4e28452914f2dcb6040f5c24965131c64a8c3d4f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe3827df-5696-464b-80ac-6a9984fcfa07.json and https://artists.proofprofile.net/proofs/artist/fe3827df-5696-464b-80ac-6a9984fcfa07.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 0xc859ed1b90dae6fd6d131fadda3e7aa6a6e30b91cf70e6842e25b1c69e93456f. 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/IDA621600031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a631ef33903b85ac4fb73b14db091e4524d4b0a32d95665c0f70a8be0af618. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/IDA621600080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf274d967ce9a867f7108622326ed09def0cad56cc39d6a0fb89fd73171a0ebf8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:47:16Z), 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/IDA621900199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa8c916f8ce2c6634ed9f3e4e436e848044603f265726cfc327a10c9710d3a5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMDA62331918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7d3541f97fea8e000475211c39c0dce43e1123eb06a3ff63f70289a384e378. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:42:18Z), 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/QMFMF2456260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa14fe8cedb4329736f1d95825800932a543090884ee0e37fce869ff95c5a4b. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:59:04Z), 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/GXBAV2053743.