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 0xf316e7f417b137534ca9c9b780a7ce3214313b69dd23b7ff15755ebaed1d973a. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e900aa09-64b0-475f-9b4c-89a2acbaa67d.json and https://artists.proofprofile.net/proofs/artist/e900aa09-64b0-475f-9b4c-89a2acbaa67d.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 0xccbc9f9942b3a5ed57b4cc70f9e916de33901515cc440ca8f724281629a47f56. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:26:28Z), 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/QZDA62401978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9fbeef91d11f4ad25625c1a3c15acf48951a918e95f106b05cffb7e83399f7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAW2554549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c083c7bc20a895df37ff3d33569f43fc0717e34a7ac3faf7a782860f94dde64. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZTAW2554550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877c02768a15be1cf32a1a05edbe1e7834870c2c9df13f1c4a3052b277c52a07. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZTAW2554551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63895f39c2ac7ebb7f402a8a865fa3135f030e452093708383227178d3beeffd. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:33:56Z), 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/QZTAW2554552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa991667f52cf3d41d597ab496c91617ce585b770e192671a80308c58fcbc83c4. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:02:16Z), 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/QZTAW2554553.