The Gurus were an American psychedelic rock band from the 1960s. They were among the first to incorporate Middle Eastern influences, maybe more than any other band of that era. The band broke up with
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 0x2d620d937987e7ef2c776e852002d6eee1dac4a4c50c9516886175bad1550c85. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de3903da-4305-4526-b80b-ef943db272f2.json and https://artists.proofprofile.net/proofs/artist/de3903da-4305-4526-b80b-ef943db272f2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).