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 0xaa6f09849a7ea3cc3860f1ee2ecd6d91faf1b7cb90911d9fa36483caa088c769. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b168a44-6b71-4c36-bfd3-ff4367144796.json and https://artists.proofprofile.net/proofs/artist/5b168a44-6b71-4c36-bfd3-ff4367144796.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Farewell My Concubine - An aria of Yu Ji
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 0x98af993ebc557d3ed2cf82194bcd90eb21c6948d9fe7d2aabf6fc811a69a2dc8. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:23:51Z), 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/FRX282152679.
The Drunken Beauty - An aria of Yang Guifei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d27ea922986e90fb361464e841a30f4beb0ac25f98ddc0289587a1a41d5c6b2. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:23:03Z), 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/FRX282152686.