Choi Seung Hyun, also known as Shawn Choi, is a South Korean film score composer. He was one of the composers of Oldboy and composed the original score for Lady Vengeance. His filmography also include
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 0xdf7bb4d592a2af38d53f2ee527e8620b9eba5c161079bc4ae526c59e5e4975f7. 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/6730f501-826c-4f6c-8719-a043603f534c.json and https://artists.proofprofile.net/proofs/artist/6730f501-826c-4f6c-8719-a043603f534c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Old Boy (Original Motion Picture Soundtrack)
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 0x9047f7eb04134b7c4257175954f6551ca77c1e1fbbcc24ff230e009d880952fd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZEKE1811329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b5b7540778c850a79b2cf363fcbdcfde6362bf6f542ae7e820a90327a062f2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZEKE1811310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888fd65e7aca09369848129602bfc5b3be1a82e04deef3729ac5bb0c58537110. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZEKE1811312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d20fca7ecebe25232c4a26ed844f162d4a58cf87355a145d54e28df5792108. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZEKE1811317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76f16b619bb1ee96be292fa8e2a42e509878cbd6467729bd66529dd529fbfcf. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZEKE1811319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b201dc6575b3582dd799d7c72d0e95e18331065b18eed3cf5c7704dc2a0dc6. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:25:12Z), 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/QZEKE1811320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cf38dc12b48099c4f914ef67fa490db82961dc821068299e134c273a2a8d1b. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:32:45Z), 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/KRMIM2106598.