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 0x8a8670665bd7c906c047fd8e8857e51671dfa9bc17b3f29fc551631b7d317a67. 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/6a0c1a4f-a107-4e8f-9da2-5ae635a98ba7.json and https://artists.proofprofile.net/proofs/artist/6a0c1a4f-a107-4e8f-9da2-5ae635a98ba7.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x65358199944dff76e7a5422975cd6e0704c921c328f990429183af96443420df. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBHFE0550285 — a six-check JSON result.
West Side Story (Original Broadway Cast): Act I: Tonight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6bef16955e8988e03efdd2d90eb47e9d41240b307dff75c4bbf4948ce35fa5. 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/USSM10411923 — a six-check JSON result.
West Side Story (Original Broadway Cast): Act I: Maria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec81303e6be2563d9669dfc1918a99e04c2b347ece716697397deb20d9a3f91d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSM10411922 — a six-check JSON result.
West Side Story (Original Broadway Cast): Act I: Prologue
West Side Story (Original Broadway Cast Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0d9fa697617ede5494d1e45156a43ee8c8139db4339a2551ec7f2d4862e9af. 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/USSM10411918 — a six-check JSON result.
West Side Story (Original Broadway Cast): Act I: Jet Song
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: Something's Coming
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d58510cfe6f6918cae1ee009977088d1f9fd7b2f18d35d8cf97b16c1a84409f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10411920 — a six-check JSON result.
West Side Story (Original Broadway Cast): Act I: The Dance at the Gym
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eed98098b4b8802193f97fd8e9819079782ff895da0665973067e8aaae61308. 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/USSM10411921 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec81303e6be2563d9669dfc1918a99e04c2b347ece716697397deb20d9a3f91d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10411922 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6bef16955e8988e03efdd2d90eb47e9d41240b307dff75c4bbf4948ce35fa5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10411923 — a six-check JSON result.
West Side Story (Original Broadway Cast): Act I: America
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdb7654af6d0450b6bedd710c98e39b5dbd4e277d23d1d1aa2b250789993462. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10411924 — 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: One Hand, One Heart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154c59608da0f6101418ea439004b4e20aa4097cd1d7b01fd5d16fc94c117a2d. 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/USSM10411926 — 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: I Feel Pretty
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07533d0b46cda1334334b8320a918904fa7a9aa88b1157c28277962bfb11a76. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10411929 — a six-check JSON result.
West Side Story (Original Broadway Cast): Act II: Somewhere (Ballet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53783fa5cb8bf80f13c074e63d2233c4f406223a2c6ef0cc766bb03a2795a478. 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/USSM10411930 — 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.