Angus D. MacColl is a Scottish bagpipe player. Life He was born in Benderloch, near Oban, and initially learnt the pipes from his father. MacColl is descended from a number of famous pipers, includin
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 0xcd837137d99837b04884738c768e1a8b5bb4637ea1634e143456e3b67599edb0. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c842ef4-ecbb-44da-8ded-9b8d6b99821c.json and https://artists.proofprofile.net/proofs/artist/0c842ef4-ecbb-44da-8ded-9b8d6b99821c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).