Heimspiel is the 2009 live album by German hip hop group Die Fantastischen Vier in celebration of their 20th anniversary as a band. It featured a crowd of 60,000 people, making this their biggest conc
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 0xb55801fdfa91a1cc8af0d477bd18a40f599681aa6a759d4b7e902fbc0531942d. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93113990-7447-4488-bb64-283143e0a09c.json and https://artists.proofprofile.net/proofs/artist/93113990-7447-4488-bb64-283143e0a09c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).