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 0x1ae60a66deb0a420bb077941d32aed07a294d45b5d8b40a96fb69e6e06d552a7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3e84a92-8702-4804-9c54-0c0d6f626b8e.json and https://artists.proofprofile.net/proofs/artist/d3e84a92-8702-4804-9c54-0c0d6f626b8e.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 0xd0c8afee054195110550812baf9326ceeefd85cb77b39e66c8f323f6b6107e75. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:33:50Z), 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/PHI010903517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19e0036f6c50fa3ba31cc0a8eb73dd04fe0cff1bb97ed4b468f3a04010095e2. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:01:57Z), 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/PHI010903519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08bdb569bb3b1f10e54edd3fa1caa7831d73690bf33395d11cb176d45383211. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:03:20Z), 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/PHI010903523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4495f189a72ea066b1bb1f4ce3a4493f1d5c1991d9a6c49c2e1943b59eb46c4. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:54:47Z), 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/PHI010903514.