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 0x235e88a68ff38bd45ed4200d8759d43429619878de1942051a49c4360e30e90d. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80ceea49-b4cb-475b-b91a-5b84ed9215c2.json and https://artists.proofprofile.net/proofs/artist/80ceea49-b4cb-475b-b91a-5b84ed9215c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
2014 Midwest Clinic: Canyon Ridge Middle School Honor Band (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 0x0ad834ed8e524d7f4fcb5e0fb2d30e1dab418b46af74d63be474706527e90158. 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/USVZX1415806.
Milford High School 2021 Winter Band Concert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a673bff4d85bbf6a6d3c3062b2dae43cb0528bc67554c30b4512fb5a2273d36. 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/QZ5FN2235973.
2012 Midwest Clinic: Shadow Ridge Middle School Honor Winds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdea903c25bde05799e1dd310cf66c696053491923fd1e3f2d8bfecb2c8eefd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USVZX1301407.
Shallowater Middle School Symphonic Band
2015 Texas Music Educators Association (TMEA): Shallowater Middle School Symphonic Band [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceec03a4de5bad94dd630e821b87094a7f822ded9b558824d972265275c6ecce. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USVZX1504106.
2013 Texas Music Educators Association (TMEA): Krum Middle School Wind Ensemble
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b13956d2ab03670697efab80d3d1975ee180d74103af1e686e39dbe947e65a. 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/USVZX1306902.
Washington Archdiocesan Music Teachers Council 48th Annual Spring Music Festival
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9f2d46048237188be4e849e7ebd63980bce2a555b0753f69643a0fffc10ffc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USLZJ2246388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4507f34e197ceb6da7f358857cbe2331cea55e8567b581e074d472f780a7566. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1701409.
VanderCook College of Music Symphonic Band
2013 Midwest Clinic: VanderCook College of Music Symphonic Band
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4226776238e4e1aaa7b9828d8dc820945d6b58c9f91ab76178c8317f49cb5c. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USVZX1324805.
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
2015 Midwest Clinic: VanderCook College of Music Symphonic Band (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92781a52bdc0225d89e9ca21b0334041f34ccd642a9cc083a9414b1fb27b407c. 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/USVZX1602402.