Nat Baldwin (born February 21, 1980, in Rochester, New Hampshire) is an American bassist, improvisor, and songwriter known for his solo work and as a former member of Dirty Projectors. Career In 2
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 0x50cbe3ce3c65b429f2849f94695ae10033358bad81c8048d6fdfa1fa94b9d63b. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1cb8cbc1-5ce6-4e16-82ee-47489a909eea.json and https://artists.proofprofile.net/proofs/artist/1cb8cbc1-5ce6-4e16-82ee-47489a909eea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).