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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fcd7b2ba70bab1ca87cf473b93ee091c1cc7ab065572d60743eeb8cc92b8cd. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfcee07f-fc04-41e2-a45e-a13131d46b54.json and https://artists.proofprofile.net/proofs/artist/cfcee07f-fc04-41e2-a45e-a13131d46b54.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Golden Age of Light Music: Contrasts: From the 1960s back to the 1920s - Vol. 2
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0562eca46da5d79da4ef65bcad5b48b5fda994edd333767daba82a826bedb84a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH6631452304.
The Golden Age of Light Music: Grandstand: Production Music Of The 1940s
The Golden Age of Light Music: The Show Goes On
The Golden Age of Light Music: Childhood Memories - Vol. 2
The Golden Age of Light Music: Musical Kaleidoscope - Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416eeba248a76a46781cad91cbd820b4f7eb8e2cead903de7244ca5e9c30c9b5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CH6630754017.
The Golden Age of Light Music: Childhood Memories
The Golden Age of Light Music: A Return Trip to the Library
The Golden Age of Light Music: Non-Stop to Nowhere
The Golden Age of Light Music: A Trip to the Library
The Golden Age of Light Music: Bright Lights
The Golden Age of Light Music: Four Decades of Light Music - Vol. 1, 1920s & 30s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042de7d1c4ef179430ffff1c11318a9b0c095fb0dede6083286889e4eaf51d18. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH6630753411.
The Golden Age of Light Music: Melody Mixture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62a8b2bccb56d1e9ddb2ceff94d03c29da06ae2cd64b3bb7480b2918829c2bc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CH6631259705.
The Golden Age of Light Music: The Composer Conducts - Vol. 2
The Golden Age of Light Music: British Cinema & Theatre Orchestras - Vol. 3