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 0xa58e7905377c7f36e571a7cbcd3c81cab28aeeb83d1d5d4a0160b92ca373d459. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6e175d6-ed0a-4a9b-a8f8-38f1cfa4e4c1.json and https://artists.proofprofile.net/proofs/artist/c6e175d6-ed0a-4a9b-a8f8-38f1cfa4e4c1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Liberté - African Percussion From Ivory Coast
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 0xe17ca81b9194e2d4898be581d60b1d87eac65dfd94f08663f29b778f665c9a7a. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:14:38Z), 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/ES7860800446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b509db8e9a39ca5094884b8466eaed195eb89d2a8a176ba6a865f8ee5aa086. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:05:06Z), 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/ES7860800454.