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 0x2f4c87caca998b02cec5825bf4ac08829c095e6e0e6cee0f2444a19b53ae5c7e. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2df50eb-cdae-487f-8bdb-ca9667d97c7d.json and https://artists.proofprofile.net/proofs/artist/e2df50eb-cdae-487f-8bdb-ca9667d97c7d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Johan Yusof #1 ～HANEDA INTERNATIONAL ANIME MUSIC FESTIVAL Presents～
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 0xc8c1a4362b1bb84aced766328b8cb382d1c3fc3a21339cdf10133a6c4274c2ba. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPN821006095.
Johan Yusof #1 -Haneda International Anime Music Festival Presents-
Johan Yusof #2 ～HANEDA INTERNATIONAL ANIME MUSIC FESTIVAL Presents～
Johan Yusof #2 -Haneda International Anime Music Festival Presents-
Johan Yusof #3 -Haneda International Music Festival Presents-
Johan Yusof #4 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
Johan Yusof #4 -Haneda International Music Festival Presents-