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 0xa2ae9f1813d6cf15505df8127d9d17e1537ead5bc2d14899368c9ac59c9334ff. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f85238a-dad8-484e-a281-3b5283f4ae79.json and https://artists.proofprofile.net/proofs/artist/9f85238a-dad8-484e-a281-3b5283f4ae79.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Traditional Geisha Songs, Original Recordings, Vol. 3
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 0x71dd75c3ee32a896fc24871cdd55fd0f252ed9a95a2109eb287613e1e8cfc3c0. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T07:55:20Z), 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/QZTVM2256728.
Traditional Geisha Songs, Original Recordings, Vol. 2
Traditional Geisha Songs, Original Recordings, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ee54a5759e3e25077ec916135a5b67bd26617fc4cbbde32804754063d622df. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:27:13Z), 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/QZTVM2256677.