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 0x56e4b1e2ed7939a7012a9bc4c28f70726af607744541ea0843d2260ad1c683c1. 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/6945ecfe-da57-4498-97c0-177e284b84a6.json and https://artists.proofprofile.net/proofs/artist/6945ecfe-da57-4498-97c0-177e284b84a6.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 0x6075ae4acc19beea3b8ab8afed87afacff508a7481b42e8a882fbc27082298ac. 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/QZVEM2334960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047fff7669f29fb58447840ae50a3ced824e4b65e4c39d64cfa8f6e8cd58b37c. 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/QZS7J2308599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373f971b59f533618bed08f015b3a4a8752cd8850e18204072a448227ca002c8. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:56:43Z), 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/NL8RL2438061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e082975ad503aa22f85b1e71ceedcfa5efea4d16d0fc949f55a72df9964476. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWU2433460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3bc365cc61443a2133d3e5a5d1e88c01e0a36695c8fc1a4e190ab34709fd59. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:40:57Z), 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/NL8RL2456122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314007d1acc7b3382d4117a56183a37636657eb143dce0658fa7a4d45404f9bd. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:33:06Z), 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/NL8RL2508309.