Marvin Powell Jr. (August 30, 1955 – September 30, 2022) was an American professional football player who was an offensive tackle in the National Football League (NFL) for the New York Jets and Tampa
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 0x0c54a0e73489b7a6e245e1754f6e4deb9a416e3f19082137a748fb40d2ed5f6d. Chain 2 (Bitcoin): anchored in block 953943 (2026-06-16T11:59:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21380475-3dd2-4eef-b62f-a3783fa98c4d.json and https://artists.proofprofile.net/proofs/artist/21380475-3dd2-4eef-b62f-a3783fa98c4d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).