The Pink Singers were formed on 7 April 1983, making the Pinkies the longest-running LGBT+ choir in Europe. Introduction Pink Singers is the largest LGBT mixed-voice choir in the UK. Founded in 1983
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 0xf10932fcb6ed03b85953bc29cc8cf9086d8c6a3230c9acf8b23cff78b4ef5a66. Chain 2 (Bitcoin): anchored in block 953867 (2026-06-16T01:09:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/066ce116-12b4-4837-a24d-f7934e12e90e.json and https://artists.proofprofile.net/proofs/artist/066ce116-12b4-4837-a24d-f7934e12e90e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).