John Herndon (born April 9, 1966) is an American musician and artist. Based in Chicago, he was a founding member of the post-rock band Tortoise, where he plays drums and percussion. Herndon also work
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 0x57a768862159e878ba20aca1eb38e7a214c3aa4fa4dd8c0bd0013d66ea8860b0. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6fac04d-9ee5-4088-84da-0c33d9234702.json and https://artists.proofprofile.net/proofs/artist/a6fac04d-9ee5-4088-84da-0c33d9234702.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Arthur King Presents A Grape Dope: Backyard Bangers