Tanz is the second recording by American guitarist Tim Sparks on the Tzadik Records label, released in 2000. The word () is Yiddish for dance, cognate to the German word with the same meaning. Hist
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 0x815d50a042646d6e6b83086f29aca306c970722d82b8738b79ea216be63437ae. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c464866b-d1f8-4136-84b7-6b0ee98dfebf.json and https://artists.proofprofile.net/proofs/artist/c464866b-d1f8-4136-84b7-6b0ee98dfebf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).