Bachdenkel were an English rock group which came to life in and around the King's Heath area of Birmingham in the late 1960s, evolving out of a combo called U No Who, whose members were Colin Swinburn
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 0xbdaf082ba9bac3712ae63a223ed1c2ec179318c05e77608681c6c8441ad7ab0e. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9602c201-0843-4b12-9645-20f9976b77ed.json and https://artists.proofprofile.net/proofs/artist/9602c201-0843-4b12-9645-20f9976b77ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).