The Sunday Service Choir (commonly referred to as Sunday Service) is an American gospel group led by rapper Kanye West and conducted by choir director Jason White. Beginning in January 2019, and initi
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 0x07f2a737e3069d8b8710e86530b01d4b40922ba32fa4dd50bdbceeb1e4eb6ea6. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28407457-a22d-4d54-83af-966d62bb3efa.json and https://artists.proofprofile.net/proofs/artist/28407457-a22d-4d54-83af-966d62bb3efa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).