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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3542daa202617de22dcf591bf0c310abbf3be45ca3bf709de126616acd8e1aa. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a365aae7-9456-49e8-bbf1-a4d5dfd6c932.json and https://artists.proofprofile.net/proofs/artist/a365aae7-9456-49e8-bbf1-a4d5dfd6c932.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
2004 Texas Music Educators Association (TMEA): All-State Mixed Chorus, All-State Men's Chorus & All-State Women's Chorus
2000 Texas Music Educators Association (TMEA): All-State Mixed Chorus & All-State Women's Chorus
2015 Texas Music Educators Association (TMEA): All-State Women's Choir & All-State Men's Choir [Live]
In Praise of Music: I Pant for the Music, Which Is Divine (Live)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb506bb9fadf1ae3a86a98c266c0f96c60df87f1e0abb80f7739fd44019634cdd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1502602 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63c2ce57a28c11ca2592936942785e6d477e964f118180d30537b522abfa915. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1502605 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905182a1a3a4edb97eecb916b71ade8387b4173e9b83a2c45fea9a4b418a4f93. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1502606 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973b6ee1f1d61f6d318f4067ecd295e3773f885e0db1b6ce7f8c053cd2ac0087. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1502611 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f9cfa932c75895de96e87b64e8a400bb563732992b5dcff659b0c67aeaa71f. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1502613 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3e5bbf3627296a2f99002efb61c99f331396accf292989f48558cabefbb6a0. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1502616 — a six-check JSON result.
2014 Texas Music Educators Association (TMEA): All-State Women's Choir & All-State Men's Choir [Live]
2013 Texas Music Educators Association (TMEA): All-State Women's Choir & All-State Men's Choir
Texas Music Educators Association 2011 Clinic and Convention - All State Men's and Women's Choir
Texas Music Educators Association 2010 Clinic and Convention - All-State Men's Choir / All-State Women's Choir
2016 Texas Music Educators Association (TMEA): All-State Men's Choir (Live)
Wedding Qawwali (From "Bombay Dreams") [Arr. E Sperry for Male Choir] [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced070ba9cf0b93d2d54d524e0b63d01e67d54c0de345afd3b957dd0cb9d7a65. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1608405 — a six-check JSON result.
What Shall We Do with the Drunken Sailor? (Arr. A. Parker & R. Shaw for Male Choir) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf589c22e0bbc7446c4884ddccbee94bfa470a5a198ad01c83176d71b32a7d480. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1608408 — a six-check JSON result.
University of Houston Percussion Ensemble
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa344507907820e43650dfc052bf86e383c7d8a31971abecd06c1200a5400ccb4. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1316810 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3767b4df48aec2f4c07d70d4c506adc7ab87537c7962ae6c5d219a4ee801ed9b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1316816 — a six-check JSON result.
2009 Texas Music Educators Association (TMEA): All-State Men's Choir & All-State Women's Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ef9beb7acefcfc58bcb13d59ee9c2259ea3f2761b3701108c069e58ebe1d91. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1222606 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e198244bdf615499b209309793284e2e4e7991a1d9f15450e509f3a9171d31. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1222607 — a six-check JSON result.
Veniki (Brooms) (arr. F. Rubtsov for choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2888fe024e5bdf390dec2ed92558ac8b4ce37914e3a5b680e62604955d4fb39f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1222612 — a six-check JSON result.
2008 Texas Music Educators Association (TMEA): All-State Women's Choir & All-State Men's Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8489eb8ac315ca7b360461b39d97d19082764ad43653219550d8290ce43053fe. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1313506 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd480e3bd5c8260a0fa7970df593d34819a66fcb041b84dc3dfc3e7a8911b4d59. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1313507 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9855364977ef3db8746d4d544e992fcd7177494cf1b09664bd441e59b7504561. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1313509 — a six-check JSON result.
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 0xb0d202e7bb68b62d22120e98e71690dc263fc4e6ad91a0548238b54ad81ed9b0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1315016 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c055b9006603ff1730b4e9f6f7c5ea12d55076b4f28e8eea53c0fdb52d24890. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1315017 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238a2d9329f4691c75d9da0d9b7ba6152424b12ab6907f0dbbc90ebc419cf4e5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1315008 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa676a3e8dd13152b82fe7e1780c294085fb1b1058e44b2f8834d5191ab374a. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1315019 — a six-check JSON result.
John the Revelator (arr. P. Caldwell and S. Ivory for choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad14431a78f243f3dfbed03ef3092a2b54ce527ddb6735fd9cb82f561fdd6a2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1315010 — a six-check JSON result.
Thou My Everlasting Portion (arr. B. Baker for choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa508507cc691fc4c1e8a022fea57bcecc2edce7b578a21f5d519d45cc16ae6d4. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1315025 — a six-check JSON result.
2003 Texas Music Educators Association (TMEA): All-State Mixed Chorus, All-State Men's Chorus & All-State Women's Chorus [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be528ec14940e278829c185a513352b04b86b1c22b2ae443fc2d3371bc5e294. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1315702 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5784ec046a7fc09d1e712dde8cb555f1f5c62d0a01bb817b58b20807f1817884. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1315708 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753bce5cb7fdcfb58702a1ed5e8655a0bb2a65b58c753280ba3723298f273159. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1315722 — a six-check JSON result.
Songs for Women's Voices: I Will Be Earth (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e300b7bbd8d13ae8f3f831eda4a81eacb8ac40301732eb55cac3325e45153e. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1315725 — a six-check JSON result.
2012 Texas Music Educators Association (TMEA): All-State Women's Choir & All-State Men's Choir
How Can I Keep from Singing? (Arr. G.V.A. Walker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fdf92a5d68903c69fe80d705e9702dfaed214ddaecda9a11cd3b3f52e8ad6a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1207102 — a six-check JSON result.
The Seal Lullaby (Version for female choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235feb5c16d5697de487372792083bc48b3c80f59e0b1a08859ed5bfea7762ab. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1207103 — a six-check JSON result.
Ain't No Grave Can Hold My Body Down (Arr. P. Caldwell and S. Ivory)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d46bb4feba8a9c7e684f148ca37dcc63f93f6c2bba08946513c086ad998b57. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1207108 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de31d801f56fc24b1d07bf5f75affe4c6106c15189b2cc4499c3cc739e81c5e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1207111 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0244bde91eac5dce1efd29569f8f51d472ffcd2d80d8a0b7d22bd7cd55a3e30f. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1207114 — a six-check JSON result.
2007 Texas Music Educators Association (TMEA): All-State Mixed Choir, All-State Women's Choir & All-State Men's Choir [Live]
University of North Texas Symphony Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7e5b2deefe6cf2fbb38a394e87922ef9eeb3da7fccde52c2843c0074f43851. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1313916 — a six-check JSON result.
Las Amarillas (Arr. S. Hatfield for Choir) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb021ec21fdccf01a39b0458f817cb0326bfcb17f1078f796d97bdc17b6387888. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1313918 — a six-check JSON result.