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 0xef76aaa8ce5c7387ac3070d9ad694313c7eedeb797f2c6b04842047e66fe83ee. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74d9e933-1206-406a-b7dc-e6eb770d0ff2.json and https://artists.proofprofile.net/proofs/artist/74d9e933-1206-406a-b7dc-e6eb770d0ff2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
100 Music for Advertising (Marketing Songs Collection)
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 0x951226cb64036673e51f9cdef1134dcc6ca45c40bb92c514c37e55f85b341cd6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:01:11Z), 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/FR6V82118662.
100 Original Songs for Musical Theatre (Various Genres Musical Bases)
100 Film & Tv Music (Jingles & Movie Scenes Music)
100 Recital Music for Ballet (Various Genres Music)
100 Music for Documentaries (Various Genres for Filmmakers)