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 0x8771d5746cc0ed8541929a1259c7dda260afb1ccc28e42032dfc6d61d9be2fa2. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9110bf16-8d37-4389-afa6-5352454ed037.json and https://artists.proofprofile.net/proofs/artist/9110bf16-8d37-4389-afa6-5352454ed037.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Overture from "Oklahoma!" - Live from Theatre Royal Drury Lane / 2023
My Favorite Things: The Rodgers & Hammerstein 80th Anniversary Concert (Live from Theatre Royal Drury Lane / 2023)
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 0x16dfc91b9c3b2abc0d10941ad5b6c6b7fed0b947531d2f8fe7d677701555a1bd. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/USC4R2442139.
Entr'acte from "South Pacific" - Live from Theatre Royal Drury Lane / 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781b329d43b7cd6af3bba8bf627a1686963ae690262a2aecce757e1ca6a385d3. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USC4R2442159.
Oklahoma - Live from Theatre Royal Drury Lane / 2023 / From "Oklahoma!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab56dd033401aff63c86cf7beb16d3973e27bb43b58f570e069443ee1ac7380. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USC4R2442178.
Carousel Waltz - Live from Theatre Royal Drury Lane / 2023 / From "Carousel"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d35850bc1ebf18877d4313a60568df81f6752627a36a3a6702a852de8926681. 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/USC4R2442179.