David Choi (born March 22, 1986) is a Korean-American singer, songwriter, producer, music composer, entrepreneur, YouTuber, and a member of parody K-pop group BgA based in Los Angeles. He has worked w
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 0xf88efa5feaecd743b102afab08351bb07384a09efee86ff1c6d810d22f2ed467. 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/0b7c24ca-4b35-445b-bee8-c2ebceb22fe2.json and https://artists.proofprofile.net/proofs/artist/0b7c24ca-4b35-445b-bee8-c2ebceb22fe2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x137277b05966077725cfe1766b9edde6566fa22eaccafc5a49fdca3f0a9b7969. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USQPJ0800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb529cd914981a287f11b7c30c2049d3eabb56e45abf71d357f6d44362dc62e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USQPJ1000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29817d9afe8d4c51fc5dd0bd450f7cb4e2955aa06e58e6ce4935f26cd1a8c96e. 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/USQPJ1000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb791e3492d951bf41c5233437553d0fa95fa74075a193fa68e4853490f438d74. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USQPJ1000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c72d460c905daab70ebf079656a8af71b939cc84be172fdaab13bce9575169. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USQPJ1000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00f5171d3270262fdd043ec5c5078fb46d34a4dd335bdf7a76dd9f6b546fced. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAAZ1107605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751db8ea64ecc94b87cd17c9cc7dedafaebb725d2ff3d9e149da278c42dfb03e. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:09:55Z), 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/TCABA1159894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6646bf92ffdb9613287867b4428a2d5f16e750613227e86e54a8ccd07b097b. 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/TCABA1159895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba30b34cdbdd4476a36b29a0a94f4b913e54ec6a8f09ebc78121007ec6c50731. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCABA1159898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781b8b4ae026ee300b2aecc60b70dfc0106d46b1ccc930f093d913e6b3eacaa2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCABA1159903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee4c0fc7a42f946bfe9111a6de4fa77f63c0a6a18f59c31907b295e471e052b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCABA1159906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0222c9d42f52830087464ca14f998a341da9978e1967b02142c8e0426e736d1a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACT1631591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1883572ede203683a483432a928e776976c29db1703e88f4fcf00aec894209. 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/QZK6M1919712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2acccf8463b2879d0afa5fc567962f2ac9e44b642d4d9e397bfa7c6d7e9f6c6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USM951100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe236ac6659d986b320a09a112c5d58546d27b071badde509536b636dd8a5190. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMLRC1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c2a8393441477905d30c144d197d35397918b96bf64050bee1f8442731f044. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USWD11676080.