Tax Free was a Dutch band from Amsterdam. It was founded by singer Wally Tax in 1969 after disbanding of The Outsiders. The group also featured David Oliphant (guitar), Jody Purpora on vocals, guitar
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 0x1be5fdea14d52c1c1ee05c5869d9ec27e77de07da630ba2181bb51786bc4af3f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f46dc5d-054d-4960-aade-66166c7b98a6.json and https://artists.proofprofile.net/proofs/artist/0f46dc5d-054d-4960-aade-66166c7b98a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).