thumb|Leek in 2019 Stephen Leek (born 1959) is an Australian composer, conductor, educator, and publisher who specialises in choral music. Early life Leek was born in Sydney in 1959, lived in Brisban
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 0x34cc54fcffae3f2314b51e3b319b3222309782228e9853a40108c9ae40dc6c9d. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc94372c-fa7d-4768-b44a-c244d1fbeee1.json and https://artists.proofprofile.net/proofs/artist/dc94372c-fa7d-4768-b44a-c244d1fbeee1.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 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 0xe0128278026ff828d48bd6aa49c5eb0ab98fd9f417a86b90cf799faf56dd8d88. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBN3Q0701626.
It was a lover and his lass - Upper voices
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6d4bdac8f0cf584d7b740bba55e10bd6b4839d9e2c965e89f9559fbbcfa8e8. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GBN3Q0701627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd83ebdb4f4cc7e6a24ab084696748978a3edbbb92e84534cf46dd305621e55d. 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/GBN3Q0701629.
The Lord's Prayer (Version for Mixed Choir & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846a2c950e6b7d64e0ed3f59ca40df3ae5d273b83b886ba7b6a0df495c78dda9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM81034740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bcb1f9726948510dde30b7abc0a4b0a5d5150339fb0d85c2f76bfff8de559f. 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/USHM81034741.
I'll Ay Call in by Yon Town (Arr. M. Wilberg for Choir & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6b0d572f14f76ae70d13334d80473d8b4402ad8bc0a5d43907221f0d72e143. 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/USHM81034750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86738213c6e51e8ea57abc4c2a1a408914efa04e4bc6686f6c0649fc6d48f1fd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81034751.
The Lord Is My Shepherd (Version for Mixed Choir & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba898f1cc47c460f74083391c711f071e1eaac939ec0c056de415dd9059fd12. 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/USHM81034752.
Worthy to Be Praised (Version for Mixed Choir, Piano & Tambourine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba181e6f6a9d0ebd0bb355a1fedd9324437fef0f29c102661023c076fb6665c. 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/USHM81034753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5553e843cd48fcde3e872b0143bc221b0f3cf4321569115c3f644d2ce5308ab5. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/LVC251402553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427a5a874032da70a5a4e2278ae46bc9034e88e55af7a8c51523d06b4f6578af. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/LVC251402554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315a78fdb3a711c77244c7e0f0b9b93339f8834e8936ea1e46d1a416b841825d. 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/AUNC11004240.
2022 Pennsylvania Music Educators Association: All-State Chorus & Orchestra (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa058b5580e030f5febc2ddd2e6d9dbdbe7a7a1501e4b506c0f30948729ea86d3. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/AUV401104386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e0b42841e1164a664d12f49715a8bb62eabc38736c40feb2cd1749699d3610. 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/AUV401104353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43943259cfcbd85d4d7b185b60d84cd69724e0c32321307fd2912d4ed3203ae6. 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/QZTBA2323299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdc8a2fb2b0b771b68ee14688bb8428c57f567d0743f3acb91eb38b41383ebf. 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/QZTBA2323300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04e0bee5547f864f2548890d7eb314c2e4cf568ee9c6824dd123dd71bf68d89. 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/QZTBA2323301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f56654ad241139c3b01ee7d18864476ed94fcf78157da7135862c72ae5668a. 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/QZTBA2323302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b79a7e865b0c32a8268a8be137e162b211314628c8f13109127b3c076307a7f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZTBA2323304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092dcc848751f1bf84521c38c80d6dfcea1e2eca0a3e4583b1064cd6106aef2f. 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/QZTBA2323305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1285a59690a2adc0998669ad6745382d31a8caa4f20e8b7481a018dae67739bb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBA2323307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7af50284a8308e362ca48b8886602b8fd7ace3f0f605a198b91a40ad35406a7. 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/QZTBA2323308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f597517f9b53994533285a86e836b27862826992b5d5dd4277dbbde3484907. 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/QZTBA2323309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6788bf2aa2cf66fcfafbc3706426cb64a08c2557d2794fb31e114beaf35815a7. 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/QZTBA2323310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22482bf4511ac3211c33804aa4ea35eb2931cdb16ecc8704441a8b77be2c2a0. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/USB8U1521372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb836e8082bbd20ddc41b0f224342f332fa51477a8c364d43f42ef1517276980b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUNC11004411.
2012 Florida Music Educators Association (FMEA): All-State Concert Chorus & All-State Reading Chorus
2004 Texas Music Educators Association (TMEA): All-State Mixed Choir, All-State Trebel Choir & All-State Tenor/Bass Choir