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 0x31253d7647996db09110294ac374af9d46c4397353b20e75539fc7fbf1686f6a. Chain 2 (Bitcoin): anchored in block 953932 (2026-06-16T11:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f943e0c-d990-4716-93d4-04d93fc71237.json and https://artists.proofprofile.net/proofs/artist/1f943e0c-d990-4716-93d4-04d93fc71237.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
2012 Texas Music Educators Association (TMEA): Vela Middle School A Cappella Choir
2016 Florida Music Educators Association (FMEA): All-State Women's Chorus & All-State Men's Chorus [Live]
2011 Texas Music Educators Association (TMEA): Fort Worth Academy of Fine Arts Children’s Choir of Texas
Fort Worth Academy of Fine Arts Children's Choir of Texas
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 0x30020258129aae64c4b8a432a496097e78364e7b6585a58140bab4dd07ee83e7. 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/USVZX1110603 — a six-check JSON result.
2014 Texas Music Educators Association (TMEA): Fort Worth Academy of Fine Arts Children's Choir of Texas [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414e1fd59383272990ac8fcab828788819188c8af7e0e706bc37b5a44c767dcf. 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/GBSMU2598512 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecd10771c21f6d2fad2ac2147b425dbb46f0fd77f9627c9bb3103626e1a6b9a. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU2598541 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d59eb73a4e861fb219319ee3b85008d7f359b68f7de4861c85aed5b4df1de6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU2598617 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc519bc2d56f0137e36838ae336c7a49d5b7e006f51f048f95b794bd4b4a159. 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/GBSMU2598621 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ee479825217ab924f1aa4faa7ea022608076622546c66baa6a0c3566ac208c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU2597077 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0392938448e96579de702b55b91685f20d56153645dd7deb4cdfee5fa4e8d80b. 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/GBSMU2597079 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8730030f053527c50386622e2236db59512cf8044aa568e55fd8faa6d87764ec. 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/GBSMU2597080 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7ee12dad48e613258c5a63aaa3239715725d8c01eca354a1e0ba137b45bf60. 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/GBSMU2597085 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a210b2efb736bce439616cf49e5515127f6957006478c941c88b6b9b612bf6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU2597169 — a six-check JSON result.
Changed My Name: Marking the 150th Anniversary of the Emancipation Proclamation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec12dcbad5985c9dd27b68b22c45e09d69e8b05996ea96030f043b5987234902. 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/USVZX1312701 — a six-check JSON result.
Wade in the Water (arr. M. Hogan for choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3d26ed1f9fd5d9c3f1c1737dc592312ac1310dfc955949865d5549fbb4062e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1312711 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb964e047c1540f3849880337e7cfd6cf652fe156913907c91ff6bd8b1d9bc2. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/GBSMU2596732 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3b122916a10092ee8ab41e3e71bf45aaca6ca0b57c795817968421e7738b5e. 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/GBSMU2600201 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd475a000344c1269329ebaeb187060a2ed22743ffa65806cc930f449d11d0003. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBSMU2596766 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf08349f0c4026b755366997fad3a3423f7f64337c9ef0eda9f5ed32d494fd4c. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU2596772 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e1420a872aeb596aba1b2c842d37de86ac2a553c5bef2cb3b28776f00bd1a4. 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/GBSMU2596777 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851b6f4ecd1438f8ecc4e4bc35fd5ad75fbec3d5e66cffca6e50c4dfb6c024a5. 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/AUAB01150182 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea66c1f7f117b7907f939a5f4d9867cf383af286040b88ced8c3fb7531a550f. 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/AUAB00550388 — a six-check JSON result.
2010 Texas Music Educators Association (TMEA): Lake Jackson Intermediate Men's Choir, Friendswood Jr. High School Varsity Treble Choir & Cook Middle School Advanced Girls Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7870bd2862dcf521ff0835738d8e35e13d8841f67537d50b79cef90f9bb7e3. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USVZX1220601 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b639e4bc5e83b314b20f979da1e4f7a82b982991a0da704faddbee9a94d4ba. 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/USVZX1220606 — a six-check JSON result.
2016 Texas Music Educators Association (TMEA): Sunnyvale High School Varsity Women's Choir [Live]
Girls Just Want to Have Fun (Arr. D. Sharon) [Live]
Sunnyvale High School Varsity Women's Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e69de285d70a4dba94a47134aac4fc45d14d944f6f65fc51534b0a5c84542a. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/USVZX1612507 — a six-check JSON result.
2016 Texas Music Educators Association (TMEA): Hudson Middle School Mixed Choir [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fceec9f6fc7f68281e259377f7f5f264743e6a0cf43043d1d2c4c6e97ca1fa. 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/USVZX1612005 — a six-check JSON result.
2014 American Choral Directors Association, Western Division (ACDA): Tucson Arizona Boys Chorus & Del Webb Middle School Concert Choir [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd79a5ac334b6a58550924bb2fcd11267f852f78ea7e7af43794790bd58c9ac. 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/USVZX1407310 — a six-check JSON result.
2014 Texas Music Educators Association (TMEA): Navo Middle School Varsity Treble Choir [Live]
2011 Texas Music Educators Association (TMEA): Memorial Middle School Advanced Girls Choir
2015 Texas Music Educators Association (TMEA): Kujawa Elementary School Eagle Choir [Live]
2016 Texas Music Educators Association (TMEA): Voces Unidas [Live]
2015 Texas Music Educators Association (TMEA): Richardson All District Elementary Choir [Live]
Bonse Aba (Arr. V. Johnson for Choir) [Live]
Richardson All District Elementary Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb298d0827fa9016d489cc33faef28168dce6fba058aecbe560aa70636e620ab. 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/USVZX1506105 — a six-check JSON result.
2013 Texas Music Educators Association (TMEA): George P. Mitchell Intermediate School Chorale
2016 Texas Music Educators Association (TMEA): Beckham Blazer Honor Choir [Live]
2014 Texas Music Educators Association (TMEA): Craig Middle School Concert Boys Choir [Live]
2014 Texas Music Educators Association (TMEA): Frank Elementary Choir [Live]
2015 Texas Music Educators Association (TMEA): McCullough Junior High Chamber Choir [Live]
2013 Texas Music Educators Association (TMEA): Walnut Grove Middle School Varsity Tenor-Bass Choir
2016 Texas Music Educators Association (TMEA): Stephens Elementary Honor Choir [Live]
2014 Texas Music Educators Association (TMEA): Rayford Intermediate Honor Choir [Live]
2022 Pennsylvania Music Educators Association: All-State Chorus & Orchestra (Live)
2017 Texas Music Educators Association (TMEA): Westwood Junior High Varsity Treble Choir [Live]
2014 Texas Music Educators Association (TMEA): Jefferson Jr. High School Falsetto Fifth [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30020258129aae64c4b8a432a496097e78364e7b6585a58140bab4dd07ee83e7. 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/USVZX1110603 — a six-check JSON result.