No holds barred or No Holds Barred may refer to: No Holds Barred (1952 film), a film starring The Bowery Boys No Holds Barred (1989 film), a film starring Hulk Hogan No Holds Barred (Biohazard albu
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 0xf001218c6120944915956c1bcfaf37894be187678df5bac1e5bbf4c64501dfdb. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee2bffc0-20aa-4dfc-8e4f-2f0b078dc505.json and https://artists.proofprofile.net/proofs/artist/ee2bffc0-20aa-4dfc-8e4f-2f0b078dc505.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).