Hayden Chisholm (born 27 May 1975) is a saxophonist and multi-instrumentalist from New Zealand. He performs jazz, improvised music, and contemporary classical music. Life and career Chisholm was rai
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 0x591f1e1ca0fdf74069cd939b79afd8912b2aec341aec52950c1b00acf644ab18. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4b8987f-d54b-41a9-95e4-909be4622885.json and https://artists.proofprofile.net/proofs/artist/f4b8987f-d54b-41a9-95e4-909be4622885.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chisholm - Schmickler: Solo and Accompaniment