The CU Buffoons (sometimes stylized as BUFFoons) is the oldest collegiate a cappella group at the University of Colorado-Boulder, founded in 1962 by Dr. Oakleigh Thorne II with help from Don Grusin an
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 0xcce2c4ab04efca5da457cf7188ce71a8c720957503c334e2592e0a68b2da4739. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32ff6085-5736-48a6-9c54-11445c72e21d.json and https://artists.proofprofile.net/proofs/artist/32ff6085-5736-48a6-9c54-11445c72e21d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).