Hyo-Won Woo (also Hyowon Woo, , born 1974) is a South Korean composer, especially of choral music. She uses elements from both Korean music and Western contemporary composition techniques. Career 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 0x51c770e54685f0b872eaea8a2fb55233aa6e12ba09b34a7abd938b3e922c313d. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e740561c-539d-4bce-8379-b36967ae8378.json and https://artists.proofprofile.net/proofs/artist/e740561c-539d-4bce-8379-b36967ae8378.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 0x69c6995a2ee297a41f1618111a982b0e4dd3f92caa1f3beeb258407e9ee26530. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/US7852500009.
International Orange Chorale of San Francisco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c94cb32c551f3294047556856c5419113014cc0e40e0afa51f69c0a852022a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGH2173396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121016db33944cbc645f8503bc2d8ebca3a33b6332cd30335f7b6ed851b7e6be. 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/BER180460409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221b05cd880e158cee1444faf27976055d5faa3978d3f62bfec512682d3745f5. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEN962336314.
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
2018 Music for All (Indianapolis, IN): Conner High School Chamber Choir [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ee227544769c1f61ca2eb377c2376c4153f98233dc8f669a1c1215b98ddce1. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USVZX1812905.
Cum Sancto Spiritu (From "Gloria") - Live
Texas Music Educators Association Region 8 - High School Region Choir
Texas Music Educators Association Region 8 High School Choirs 2023 (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b38020a36f0a4637f1f7c75b49a53a382dee2a17659b6b831247dc4f4d290e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBRKQ2453780.
University of North Texas A Cappella Choir
2010 Texas Music Educators Association (TMEA): McKinney Boyd High School A Cappella Choir & University of North Texas A Cappella Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589ec97e88a31e85225d1c87bb8598b322e68c51e6c9f8826a4ba9339486c618. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USVZX1220517.