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 0x075ed0478c2750caa3e9dd411cdd18953e1c5ff3826d4c9c741ad713d0a965db. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ab8f0f4-4dbb-4889-8c7b-fcc0c48329fd.json and https://artists.proofprofile.net/proofs/artist/2ab8f0f4-4dbb-4889-8c7b-fcc0c48329fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Human Resources (Original Motion Picture Soundtrack)
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 0x5716aa7746fca60abb8eaeb1ffec596b8835e4fa57f4ad4408e12380c7488e8f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:41:16Z), 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/QZPJ32137187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8665ea78494a4aea12ed8b9c5857c80641f5b7ab91235dff8b6525e486e80520. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZPJ32142176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893cdec3b81911e76018430e64b25ac57357bdea1d199176240391e3895fb10a. 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/QZPJ32142177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6526cd39828b821c2a13fd139d69ee1828d99b81cf13c3471b699d6b076ece8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPJ32137193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d349ae5d7265083e670ce5f3066074cf5ffdbc358b5bf153b5c33d4d2b8900. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZPJ32142178.
Lifts (Original Motion Picture Soundtrack)