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 0x6c2dae414561819cf3479667b12be4e221ddd100df36e9d496dfae612bac4633. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7dbbae8-8440-4ff9-9485-d1aaa0df703c.json and https://artists.proofprofile.net/proofs/artist/a7dbbae8-8440-4ff9-9485-d1aaa0df703c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
West Side Story (Original Broadway Cast): Act I: Jet Song
West Side Story (Original 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 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 0xda466104dac1c23b8a04cebf4fae30f2500a031d0a07946a345c350382d00807. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10411919 — a six-check JSON result.
West Side Story (Original Broadway Cast): Act I: Cool
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71086a8bc6bb2a5c7a03740f408f6fda0b1b7d69871e409d5771cb582f25a0ae. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10411925 — a six-check JSON result.
West Side Story (Original Broadway Cast): Act I: Tonight (Quintet and Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5124c34bdc48d95f7321c2c014c427c965a515356033d8fdb685a14615b3928. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10411927 — a six-check JSON result.
West Side Story (Original Broadway Cast): Act I: The Rumble
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08eb57c7251cf55c21e952626c72ee5a0e4db464ff28727aac62094e4566a2b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10411928 — a six-check JSON result.
West Side Story (Original Broadway Cast): Act II: Gee, Officer Krupke
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faa8d412770db01c5182155c7790257af1ade2aaa16957b5e2dc5adacce7bcc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10411931 — a six-check JSON result.
West Side Story (Original Broadway Cast): Act I: Jet Song - 2017 Remastered Version
Original Broadway Cast of West Side Story
West Side Story Original Broadway Cast (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6988c8c191b0a175962e8b5fe0085814df47e8a3ea3bfdf78801e02ffb7b1710. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11703222 — a six-check JSON result.
West Side Story (Original Broadway Cast): Act I: Cool - 2017 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa506ccf497b2f80822c660f2f5692a7a1917045fe6e7ac6253e7dc8176e653e8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11703228 — a six-check JSON result.
West Side Story (Original Broadway Cast): Act I: Tonight (Quintet and Chorus) - 2017 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59175ed57c03084c9f371ca262b68caf9b316d54184807ac8031d2f8bef493e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11703230 — a six-check JSON result.