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 0x467618907643f645cfac6c0c968d9b8a62a65143f905935f79c10649465e8f43. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a299cde4-d78c-401e-bdc7-5ee883298f4a.json and https://artists.proofprofile.net/proofs/artist/a299cde4-d78c-401e-bdc7-5ee883298f4a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chen / He: Butterfly Lovers Zheng Concerto (The) / Eternal Regret of Lin'An
The Butterfly Lovers Violin Concerto (conclusion)
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 0x94c70ed5e06054d967b44ed8eab89c593a946a4c8c9a7c29de69fd343f57f340. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI190330501.
Butterfly Lovers Violin Concerto: I. Adagio Cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d4d5caa089c2394a392fb2a6c98d381f982bdc36501c94cf9646385eebe1cd. 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/USSM12300984.
Butterfly Lovers Violin Concerto: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a32770ad341215b1f1b5debd919cfaf4e484dfc59f138bed36d2861b034e4e1. 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/USSM12300985.
Butterfly Lovers Violin Concerto: III. Adagio Assai Doloroso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc52baad3759f2c542fbbf4552ab442652d78e1b9cd576ae34e955ce3305710. 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/USSM12300986.
Butterfly Lovers Violin Concerto: IV. Pesante - Più mosso - Duramente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef84001234b3f4393cd4e8788c6ed1cfdb893fe05f5e0aa7fb2e41006d9a9a11. 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/USSM12300987.
Butterfly Lovers Violin Concerto: V. Lagrimoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573bcaac08c9f86ee6bcaaddc5422ba7e476edce2c5817d2ab4c927c8f4faf1e. 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/USSM12300988.
Butterfly Lovers Violin Concerto: VI. Presto Resoluto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80cf8e17ad006bef8d7fd88e63cabddefd6ae6fa90a4797aa3c4f9bd2335f81. 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/USSM12300989.
Butterfly Lovers Violin Concerto: VII. Adagio Cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e96e39c8eb0ba18a79678ae265404fbc4586b63f97735890335803b478ba01. 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/USSM12300990.
He Zhanhao / Chen Gang: Violin Concerto, "Butterfly Lovers": I. Falling in Love (Arr. for Guitar by Xuefei Yang)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03325d71f018477601aa05d655912b2c174cdb47c93006ab0cb805a24dbb5d5e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CNF180800008.
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