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 0x577f476c6a94ecf57f3923a727fe06f87e193df68f1ca29fc59dbbb0b9cc2b0a. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51916f8f-1f7e-496c-8aaa-5462f10a8971.json and https://artists.proofprofile.net/proofs/artist/51916f8f-1f7e-496c-8aaa-5462f10a8971.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 0x503422cf95291d6b93a33e066d48e7d989b3b6c0613510a83d7bf11da3a2a6b9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:22:37Z), 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/FRX282032852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6873f8b678503db08b27e9895f7ddcc04d5375183e212bcc543f8ae9e8abeda4. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:07:41Z), 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/FRX282032853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1161bafa0d04a28ed3b56b5b603ccd71fd16f57cd34d7ed92392c3e69e27fd4a. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/FRX202099179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc870f292c101ce75de5d78f07d16cf8346cfa06e1ce9ae18ea11a5636fb6e75a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:51:51Z), 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/FRX202099180.