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 0x4445685d2a362ee87122a7a0d8bb8cd86beaeb2b52d6db3dd65926cd7b5700dc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc623b85-53b8-427d-b382-96a62e4a2a0b.json and https://artists.proofprofile.net/proofs/artist/dc623b85-53b8-427d-b382-96a62e4a2a0b.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 0xe09163a79d53c40e0ab720c2efa2f209abc5014e1912b65dbfdc63c417c9e73e. 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/USL4Q2295805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6a110169de5f4a36e93425922a2cea3f2fd516769d5f6bc64114683b9f46be. 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/GBN3Q1701126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c297acee8f8bade68a00e0764d530dc1c2f8759f4ab5461a7ab9b1f922b2732. 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/GBN3Q1901545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577e5abf275e8731f2ca1339ed90dc1ecc974602f0d53d04a73ed499153d3348. 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/CAENV2110218.
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.
2018 Texas Music Educators Association (TMEA): Montgomery High School Chorale Women [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9a247a620ef5505baf06f74694f8e7005d18c617503da4b565b191f47a1555. 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/USVZX1809904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c32178d0f5069d5e502b1086bda8c2cd34b77b29f58f02968b3b04dda39a5f. 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/GBN3Q1801240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173e22aa9684ac62a6a78256b00c2e07f31f269335113e534077328963e598a4. 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/USHM92211342.
We May Rise (Arr. P. Hazzard for Wind Band) [Live]
2018 Midwest Clinic: Carrollton Wind Symphony (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe500f83b319d194312602782557488c5b128504bcfc02a06d87f579a8133210b. 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/USVZX1902608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaaf444173ecd16123f67a13fd3b4d7e6e8e8ea45e8d9cdd3e5b8ebf14b6731. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USHM82246336.
Peaceful Choir - New Sound of Choral Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e85681d5b6fa881169dbdf08e698dcb2fc517dbdad62267ac980482e25440c7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEE862000687.
Peaceful Choir - New Sound of Choral Music (360° / 8D Binaural Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0763a2d958ca1148d6775592c55d662fd1e881d2f539799e2f790a3e58b64fe. 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/DEE862002528.
University of Texas at Arlington a Cappella Choir
2019 Texas Music Educators Association (TMEA): University of Texas at Arlington A Cappella Choir [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e83f450593ccc0ed4142b137e3b7ea3018da394e8629cf7954825fae493a2f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USVZX1911505.
Press Forward: Singing Through a Pandemic
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98d8355ea957d7086df9236f3eec94ba7b3ff1ed572fa5d62f67e6d26da3928. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QMRB32100029.
O Love (Version for Bass Choir, Cello & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33b22ca88c85673141f2401b5612f6da74d4db1448fef586d90223bdfc1eb7b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMRB32100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8fbbf89ab3cb3f9a60f5afb72f3a558502c6534c2a130c09fd38bd5fde5717. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QMRB32100036.