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 0x24d0180c0c208c51d100b7e312a06f78699ca7785063ad3b5f60f431223b1bef. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4dbc8ef-d5af-47d0-bdbd-ba430f8a64aa.json and https://artists.proofprofile.net/proofs/artist/e4dbc8ef-d5af-47d0-bdbd-ba430f8a64aa.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 0xef004817c52403c351887b9c782835a4ed1943bb1628a888f12d7e4542029342. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USMA20215003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de1912d32cf8603e9822ad44c4b52d46f86a7d1ba20a2da3e53ae4740a13c6d. 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/USMA20215005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa54683ec73e735f11dcdfa9097652f97ff5999e2e5cc4a8e894fe83e59aea2. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:27:29Z), 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/USMA20215006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c97f9b1f3cb3f8d1710400c18d98cda8f7d590b2c45914182617c3bd2eb683b. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:44:58Z), 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/USMA20215007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c97cc55ff3bf2d9c6b462cd99772011e36a8b55b51c9c59c916e93b0ef7c02. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/USMA20215008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2779c44c00b93907ce56359e7cee6e64a353f7678d1523c54bc53d846a2023. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USMA20215010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefbc5359e1b2a7e10472ab0a97dc538a513701a49477809a1cd060653495b5b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USMA20215011.