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 0x872c081456fbeaae634d98d07197dc8e94d3179d12c386e73e5dc62be31efe66. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf0617dd-ec7a-4a9b-94c5-207d4eb892dc.json and https://artists.proofprofile.net/proofs/artist/bf0617dd-ec7a-4a9b-94c5-207d4eb892dc.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 0xa171dd4ee876b55b0aa4a10b0b1f9a7c95059531e56997260d9fc5ce8ad6a204. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PT8JF2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd222d4f0641da4426ac8ddb3a2c1d8f3e9c2990deec65409ad489ab36d51e3. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:43:31Z), 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/PT8JF2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb664d11c6a3d8a0bbc6b2855f04ec98aba7be80fdd1153d1ee38f6335b33632e. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:41:22Z), 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/PT8JF2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c66f41ac8c1e389695d8bb3d4df63c36d31a9c7a5b3fe39da7bc8a5b86a5048. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:07:46Z), 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/PT8JF2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c66f41ac8c1e389695d8bb3d4df63c36d31a9c7a5b3fe39da7bc8a5b86a5048. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/PT8JF2400001.