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 0x6708be596a7a028a75bcc958c556fb1c5c2d591868dab9aedd6fb9d36ce4a092. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54f21f3f-9b3c-42ef-9046-5e2ec9b02b89.json and https://artists.proofprofile.net/proofs/artist/54f21f3f-9b3c-42ef-9046-5e2ec9b02b89.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Johanna (Act 2 Sequence) - 2023 Broadway Cast Recording
Johanna (Act 2 Sequence) [2023 Broadway Cast Recording]
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 0xe4539afacec2a8dede8f8554c8f2d7594ffa239b28091f4af6a9d1d04f19f6f2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USRH12301850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3ac6c7be97341aef4e2d7426218caec129f9ad976e0bfa796551911607fec5. 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/USRH12301824.
The Worst Pies in London (2023 Broadway Cast Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4539afacec2a8dede8f8554c8f2d7594ffa239b28091f4af6a9d1d04f19f6f2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRH12301850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0a56f9de728afce958216e812f83f72052d8e451da62b6a6f49b93a6715679. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USRH12301788.
Sweeney Todd: The Demon Barber of Fleet Street (2023 Broadway Cast Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e34289b3835e266bad87811a350f1df63e0e2785bdd2d0434ef07e5ff24205. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USRH12301835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c15725603a871274cc61810f9b26083d45b81bddbabfd9132e4110157aa2713. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USRH12301836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4665278cfd62a0442e9d485aac8db3a47c91f547b5227ca3b49b97aad83e4d9f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USRH12301841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a87b7e9ff6a8d1dbc353981151af8649967ce488b4eafafb4c2773eed10f076. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USRH12301844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604a4e07056a0b3c32bb4d60b9c431280755e546f9d8a1a8b9db3457d6636478. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSK32343240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f64b47efb763118004d0f766e373ed7e0d0e97e646d4daefc83b2019fb62f66. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USSK32343242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0076b95983c78b44244c86f9a90a9c00e0434f67d771e6bab10e7c5a09ad4bc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRH12301865.
The Ballad of Sweeney Todd (Opening) [2023 Broadway Cast Recording]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0a56f9de728afce958216e812f83f72052d8e451da62b6a6f49b93a6715679. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRH12301788.