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 0x25190615d53a3cdd937e57b4aa3516f8dfbbc71d014948e303713f4de161866a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82a93bc5-8217-441a-8c9a-4120fd8c0fcb.json and https://artists.proofprofile.net/proofs/artist/82a93bc5-8217-441a-8c9a-4120fd8c0fcb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
2009 Texas Music Educators Association (TMEA): All-State Mixed Choir with the University of Texas Symphony Orchestra
2019 Texas Music Educators Association (TMEA): Texas All-State Tenor-Bass Choir [Live]
Joshua Fit the Battle of Jericho (Arr. S.V. Gibbs for Tenor-Bass Choir) [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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cbbdf017481187ef73eabcfb79cfe47d7ab02e4b4ac7d994a41a89113aad6c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USVZX1909607.
Ave Maria (Version for Tenor-Bass Choir) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7425d54e1d49bca732b7d79df8f592f956a045f584d5274f02230b376f380d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1909602.
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 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.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1315702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5784ec046a7fc09d1e712dde8cb555f1f5c62d0a01bb817b58b20807f1817884. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USVZX1315708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753bce5cb7fdcfb58702a1ed5e8655a0bb2a65b58c753280ba3723298f273159. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USVZX1315722.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1315725.
2016 Illinois Music Educators Association (ILMEA): Honors Chorus & All-State Chorus [Live]
2017 Texas Music Educators Association (TMEA): All-State Small School Mixed Choir [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f0fa16bacd087bf240fdb46d809a503b7d1e66516c78ffdc902ecfdf8e8d75. 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/USVZX1706906.
Carol Barnett: Treasures from the Archives
New York State School Music Association 75th Annual Winter Conference 2010 All-State Concerts - Women's Chorus / Mixed Chorus