Sydney Guillaume (born 1981 or 1982) is a Haitian-American composer of contemporary classical music. He is known primarily for his choral compositions. Early life and education Sydney Guillaume was b
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 0xe40901cd04e6068f8a715f5b8b17418cc15241d28dc51a9626cd29b7951000e9. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c46d3e23-6b83-486c-9ea3-d37ca404f242.json and https://artists.proofprofile.net/proofs/artist/c46d3e23-6b83-486c-9ea3-d37ca404f242.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
2019 Florida Music Education Association: All-State Middle School Mixed Chorus & All-State Middle School Treble Chorus (Live)
Florida All-State Middle School Treble Chorus
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 0x0e1a357837bd0effeb16b506dc7ed250530467a9e3d677873250a53e6f8d5c58. 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/USVZX1907606.
Nda wana (Arr. M. Barrett for Choir & Percussion) [Live]
Florida All-State Middle School Mixed Chorus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd820406b086f1aba7bd58a444505d27924dda011385c01894433357691a52b65. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USVZX1907612.
Kaval sviri (Arr. T. Parvanova for Treble Choir) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf611c6039934472a42517aaf3d601410ae372cadd7c7e128cbc1eb6d18667b74. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USVZX1907603.
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
Oye (Arr. F.J. Núñez for Treble Choir) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fca88a0ad101889a540ffadafe80694333e875a94fb64f74a2a62331a5a3f29. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USVZX1907607.
2010 Texas Music Educators Association (TMEA): Texas Two-Year College All-State Choir & Juan Seguin HS Chamber Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ae6029d13707bf0bfed53bb83863c1527fea007346cd5cafc3558b6c480363. 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/USVZX1220017.
2017 Texas Music Educators Association (TMEA): All-State Mixed Choir [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe2f933ba6fe56b3024a1eba4d4c2b4f13d0988d8261cb0a5e35296a6cef9f3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USVZX1706807.
2005 Texas Music Educators Association (TMEA): All-State Mixed Chorus, All-State Men's Chorus & All-State Women's Chorus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238a2d9329f4691c75d9da0d9b7ba6152424b12ab6907f0dbbc90ebc419cf4e5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USVZX1315008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3253e56fc91b71f74984ff5ba9c741a25d5d740f52c69680530d75da11cf83ca. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLLH2168607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cea99e047fa17693e30664ae08869b275e626d3af893e412fb1fdf4cc788327. 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/TCAES2062910.
2012 American Choral Directors Association, Western Division (ACDA): Tesoro High School Madrigals & Box Elder High School Madrigals
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9660bf3d814e5ed158b697b9c6931e38c674343332cd12425bae45b92353d9. 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/USVZX1211907.
2019 Texas Music Educators Association (TMEA): Texas All-State Tenor-Bass Choir [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af35501ff62b016d61b0eaba34bf94b2bcf3301fe2e4b46eba6cdf12bbe473e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USVZX1909605.
2014 American Choral Directors Association, Western Division (ACDA): Westminster Chorus & Utah Valley University Chamber Choir [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176e495bfde8d217b910e7fad70dc23af0352f176a4c7caa49676fb79e68d18c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USVZX1408202.
Woodlands High School Varsity Treble Choir
2013 Texas Music Educators Association (TMEA): Woodlands High School Varsity Treble Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea861547153af2cb27dfc5b99a0313107dabc1d4ea4fe740201371d90dd24df. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/USVZX1307702.
2018 Music for All (Indianapolis, IN): Lafayette High School Madrigal Singers [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8354762352df7c7fb097621fc0f73ad49ce48af1e34a9c3220142e8a87b715e2. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USVZX1815705.