Sleep Token are an English rock band formed in London in 2016. Their music has garnered widespread media attention and popularity in recent years due to their esoteric storytelling, vulnerable lyrics,
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 0xca6ef1b62609727d0a326f43dc5b39068538c3883dad1a16b21d36e05e7d8d9b. Chain 2 (Bitcoin): anchored in block 953923 (2026-06-16T09:51:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b9ca4c0-7b40-4491-97fd-6e5ee27bfd80.json and https://artists.proofprofile.net/proofs/artist/1b9ca4c0-7b40-4491-97fd-6e5ee27bfd80.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).