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 0x7fc9ba3453f74b9cc366a38ef671f710226bd790c6251d8387af5a78bfc11db8. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c87cb52-b218-43b9-bf82-f5d4398e7295.json and https://artists.proofprofile.net/proofs/artist/9c87cb52-b218-43b9-bf82-f5d4398e7295.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x02545d5202bb2aff37f4d0edf4c00d5de092739eb719343b33a4502514155aeb. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZPEW2528974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe429994a05ae9cc75be1f4832d8da1642ea20c90a26b83844bcc40656a337989. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:47Z), 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/QZPEW2528975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea6c336f3ce4b30fc0d86977fe1008f7339d54c3a8aaca885509dfaf0639384. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZPEW2528976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315151958b6e7df5e15c5ebf2ac336a62777275c77247ac9842661769db0f362. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:32Z), 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/QZPEW2528977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818838a7f7a1341cd2a1a20f46462b935016af77cd54b17be0eeb8671280479a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:55Z), 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/QZPEW2528978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f800ba5818da36bdfe0c937859a68f9a9d54b88ba2c7fc920e8ece60617a8c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZPEW2528979.