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 0xaca4f194cb14fc94f2cadd766c7689191bfb5d5b747ddf45069c4aaddb3b30cd. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55796850-e6d8-4438-9e66-757afb498b64.json and https://artists.proofprofile.net/proofs/artist/55796850-e6d8-4438-9e66-757afb498b64.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chen / He: Butterfly Lovers Violin Concerto (The) / Chu: The Yellow River Piano Concerto
Chen / He: Butterfly Lovers Violin Concerto (The) / Yin: The Yellow River Piano Concerto
Chen & He: The Butterfly Lovers Violin Concerto - Yin: The Yellow River Piano Concerto
The Yellow River Piano Concerto - The Butterfly Lovers Piano Concerto
The Butterfly Lovers Violin Concerto (arr. Gang Chen for piano and orchestra, edited by Jie Chen)
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 0x87c7ae09264f81b881bbc87442c40aca78f1a95de55be4708654a83ddf3fa6ff. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:23:28Z), 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/HKI191157405.