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 0xef6a5b0047367dd56915d4baa916521dabb96d008b5c650326eacfae14fee7e7. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f989f2cc-373e-431f-a4dd-04782cd367a3.json and https://artists.proofprofile.net/proofs/artist/f989f2cc-373e-431f-a4dd-04782cd367a3.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 0x977b37a27d669174ba985ae6a56fec16d79ec96233f8a6ad06d70e8020de9cbf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZXLZ2377179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944d1eac86d887fc5a177af400cf3cb5edf8ae05fc4632ef463efde2742c0049. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZXLZ2377180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9beb283690a45f952dc150b6c3d3302ee95f9f268ac2d7f471b909ba1a021d57. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:10:57Z), 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/QZXLZ2377181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff01141ec06365aff48161cf03b39ba7887b6f4598eee6385b06b5fb152111c. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZXLZ2377185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5740a78244a9a37080e06585204a0fe9ea82a3a8bc5450f81cb60ae00857f40. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:46:50Z), 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/QZXLZ2377187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa8d92a29090c00b148ab202e4f582d8ef719093cf1b73b4ea8a6ddd75902ef. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:58:02Z), 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/QZXLZ2377188.