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 0xaaa1f9cf9cf2cbb71bf1f71fb53b0325e420bc58211a8b4cfa15ed482da0adc7. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28d76fc8-6b6e-4b32-a06e-4d9efdeb5ddd.json and https://artists.proofprofile.net/proofs/artist/28d76fc8-6b6e-4b32-a06e-4d9efdeb5ddd.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 0xfa43c768c98af313871617e23404e089e06bb6ac71278df6539e9b553c2a1813. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:57:12Z), 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/TCAFX2149738.
Queenie Was A Blonde - Original Broadway Cast/2000
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851395dba4d847ca733274f39f9bee0ca870163971f6312776e2f80a4a519fba. 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/USUMC0000120.
Wild Party - Original Broadway Cast/2000
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5880f9f97fb24eb535520695307d3084e108af9ecd3b717308c24287368bf8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USUMC0000122.
Welcome To My Party - Original Broadway Cast/2000
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dd59f7099f8d3f1669c9075e576febfe9f493331dbb2b85c5264816e90138c. 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/USUMC0000124.
Moving Uptown - Original Broadway Cast/2000
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279b8b3698a0b340b60eab1f3a174a30cc9aff3aac77719b6390989787a0ae95. 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/USUMC0000129.
Best Friend - Original Broadway Cast/2000
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed0276f939084fac55b0a18662aea8750fdf49faf463abc7d5b470243cdbf0e. 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/USUMC0000130.
Gin / Wild - Original Broadway Cast/2000
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4e09bc645afd166006c13317d0183a9a4d802b7a9c4ff511f166577ff8a9a3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USUMC0000134.
Black Is A Moocher - Original Broadway Cast/2000
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf455055ed0e262d545e7d742b252d3856f185ce6dff7a9cc8ec36ea183963661. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USUMC0000135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d61814b1bf9a830a6523a7a39d053c9ac295c46feacda173ba67252a5fd29d. 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/USUMC0000136.