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 0xfe6f126149c6728e09f5cc352b8813ca5752558ad0f92c57eee2cbe31369d07a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d00d8d2f-9b8a-4199-81dc-6d78f82f31ed.json and https://artists.proofprofile.net/proofs/artist/d00d8d2f-9b8a-4199-81dc-6d78f82f31ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Peter Griffin vs Homer Simpson Rap Battle
Captain America Vs Deathstroke Rap Battle
X Vs Samus Vs Cyborg Vs Raiden Rap Battle
Slender Man vs Jack Skellington Rap Battle
Deadpool Vs Deathstroke Rap Battle (Extended)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021ca1885f0c185839d8a48430cb9744446e0d99e20e062e65bc4a8f8646c67d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:33:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES91900888.
Back to the Source: Epic Raps Volume Two
Sonic vs Shadow Rap Battle (Extended Sonic 3 Edition)