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 0xc250b3963f2c0dffa49bc1a3c9b56a8c5440e2b38405b118e0cdd48966ad8cc4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26fa4f04-d058-4ba6-a2ac-ca0c029adbda.json and https://artists.proofprofile.net/proofs/artist/26fa4f04-d058-4ba6-a2ac-ca0c029adbda.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 0x8b53f25660427dc8a3d2e741ebe6602fc07bc7bb1191fa5df00111773e7ecbaf. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCACY1766720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5cfc45db9f435776c6be7f02672d8e74ba109c8d4d78a4ddac56b151849a54. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:40:28Z), 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/USDY41985614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f70cd0d01a9969e8da5c5a6cf4eed1656c5ad31bdbbb2c425e7aeba31af216. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/USDY41985621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa455df50ba5ee473e66d643632f06fc136a7946ca55d62024326d403af418194. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:28:28Z), 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/TCAFZ2287743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f34d0631d59f090cceec09d33ae3a8672073baf55361abe0e444524cb52cee6. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAFZ2287798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba6a75ec90acc67aa27c86832faed4dc6c485939157cb2da6cfe9ddab952a48. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJI2508379.