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 0x752a002d809eb8391bdca2c9acc507afe6156eabb2c5e985e1b7d0d17ac9767f. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8aa9272d-b0f9-46c3-8c7d-1b48d2249bb9.json and https://artists.proofprofile.net/proofs/artist/8aa9272d-b0f9-46c3-8c7d-1b48d2249bb9.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 0x3871735dff1a08677108d4596be6de78748418df3efba344cc94a3bc46c720ea. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:21:39Z), 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/FR6V82428565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3117106381be3ad29e43690fde1aefe86e58994e4de656a39ef6abac9b5db210. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:07:27Z), 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/FR6V82428566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050382dc2abdf19fc2cbe5dfdd7c9e2179439e94233ef17aadf87909d8d6fefe. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:29:54Z), 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/FR6V82428567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595a2841c680f1bce3918970dc355ce9b551be2ab0e27df7cff401a9d3c35791. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR6V82428569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e22b735432d63049c932d60ea21a3c8eaf8815fb8e6376a67a23668aec4a07e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR6V82428571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb8e203572d4e141d77eb50d2fe5b1f1c31ada16367c74c9ec70dd0cb5192fe. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/FR6V82428572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf91b73c8108a85459d691176e145c9344969c7228fea1885bc3afbab0b3670b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR6V82428575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0364e1b3dd7346bc8eeba791cb86fa86b131a04dedf120175a096c39875770. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR6V82428576.