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 0xd2b4d06618eb9acf2b1641c3eee0d7e8403b36612e31161494485e4aead1a344. 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/5cb9f2b2-9143-47f2-951f-7736e2d1dbe0.json and https://artists.proofprofile.net/proofs/artist/5cb9f2b2-9143-47f2-951f-7736e2d1dbe0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The White-Haired Girl Suite: Movement 3 - Red Head-Band
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 0xdec6355e7218f61c077ab36326398681db618ae8794b7846cc6ea3503f05c23e. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:09:55Z), 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/HKI190191103.
Zhu, J.: Butterfly Fountain / Symphony No. 5
Wang, Y.: Symphony No. 2, The War of Resistance Against Japan
Shi, Y.: Symphony No. 1 / Horn Concerto, 'Memory'
Liu, D.: Mountain Forest / Wang, M.: Haixia Suite / Huo, C.: Bengbeng Suite
Qu: Fantasia of the Red Guards On the Hong Lake
RITZEN: Chinese Requiem / Chinese Violin Rhapsody
Ma: Symphony No. 2 - Song of the Mountain Forest
ZHU, J.: Symphony No. 1 / Festival Overture
Zhu, J.: Symphonic Fantasia / Symphony No. 4
He / Ding / Huang: Chinese Orchestral Works
Chen / He: The Butterfly Lovers Violin Concerto / A: Hung Hu Violin Concerto
Chen / He: The Butterfly Lovers Violin Concerto / A Ke: Violin Concerto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9033c2604a1cd0ca5b06d9f76c87a60007bca5248c8fad0ad14e5b3f0d9a33. 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/HKI190562103.
Leschetizky: Piano Concerto / Contes De Jeunesse Suite
Contes de Jeunesse, Op. 46: V. Toccata (Hommage a Czerny)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3143b17d96bdcbe60c7721c68fe08064d11567fec7405b133a694618ced70f45. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKI199525907.
Chen / He: Butterfly Lovers Zheng Concerto (The) / Eternal Regret of Lin'An