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 0x38828ad3f71049bff6461a8f621858ba3e8e169e59d2a4402a8134341d1c8fe2. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dff95ed4-4be5-4144-bc9c-5af1ec365b4d.json and https://artists.proofprofile.net/proofs/artist/dff95ed4-4be5-4144-bc9c-5af1ec365b4d.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 0x8d8728fbf8d8186f58a6d198706f886dfea9bccec0a67ffc3a8202a90415a2eb. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USRW32100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63f8578c34f850e0d571f6997bf5945c63d491ece5ea6eeb295b76fd6ae7daa. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:41:23Z), 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/USRW32100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61404f69319e86973dce3ca33fbfeea20bd85a4fc91fa491b61f0bbdffa64fbd. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:01:17Z), 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/USRW32100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf7cb39e9da2585946b489ceb8bda04eba421e1e9b59eda95ce7a3b4d6a72c0. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USRW32100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdbc19fa6cdbf318afb76c2a0b924a0bdc1c780e01e94d1fe3fffa7a55a276f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USRW32100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e0ae90912d3dcf9865c730ff15d512ecc0f39d901199cf4ef43c68dc778c79. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USRW32300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb33ef98904e91349716a5fdbd95cbe9f261cc68d1fde3ad80f935661bfce154. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:47:06Z), 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/USRW32300007.