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 0x1fb094093b2295996fe6fc26ab8e751d7738dc8cc4db65dc241083a6106bd1a7. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3dbb64e3-a68f-4b78-87ff-cf3aa23968ae.json and https://artists.proofprofile.net/proofs/artist/3dbb64e3-a68f-4b78-87ff-cf3aa23968ae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
2012 American Choral Directors Association, Western Division (ACDA): Junior High Girls Honor Choir & Sacramento Children’s 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 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 0x74606a0b891c25c5cce7e18e0f39589e34b34af1c4a18216c6b204f46d74f9c0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USVZX1212207.
University of North Texas Symphony Orchestra
2007 Texas Music Educators Association (TMEA): All-State Mixed Choir, All-State Women's Choir & All-State Men's Choir [Live]
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1313916.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1313918.
2018 New York State School Music Association: All-State Mixed Chorus & All-State Women's Chorus (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fdf50106106ef47b08b44af0a3310a7449eb5e3f5cdd67ba2e82067d55929e. 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/USVZX1906004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e9d46b9f8a263818b1e2de064267f7166a0f1a55ac338797f1fada7a62d02c. 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/USVZX1906006.
Way Over in Beulah Lan' (Arr. S. V. Gibbs for Mixed Chorus) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b8a938632f441e9cbad0c209461060353a2f050c3a842d8e737ecd67673664. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USVZX1906007.
Let the River Run (Arr. C. H. Johnson for Mixed Chorus, Piano & Percussion) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1656edf1164fca49a4a89b6616f16bac1f11923746b592b349b264fa804d8c4f. 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/USVZX1906008.