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 0x9a07bf50cf4b8533b217c531d49168b156c8b9fd06c2768d126ba69d129825a2. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be48cbef-426e-4963-95b0-b7b794227f10.json and https://artists.proofprofile.net/proofs/artist/be48cbef-426e-4963-95b0-b7b794227f10.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 0x6e754ce83dda6b02973a41836cbba3ac556ecf148ce13897edff29a3cae85935. 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/TCACW1769229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019bc43e67829c18553728f9e9285b94f84c84618d455807fc1d83e47f9cfb22. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCADZ1816195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59351113728d570eb4fc86048aa1f6ebd8493bc9414495449029c14e46924886. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:46:04Z), 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/TCAEN1960177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bd4ec1d12e38e0b83b224c4632a660cb301d45cc491e8483e1d4005593c0c0. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:17:30Z), 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/TCAET2002134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192835605191c84abadffb696d0d9e36ea929cc54b537adbb52d0b94917072bd. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:48:38Z), 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/TCAFC2015869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd318cf2964c329ec5a38b4d850a39045123bcec67892c7369a63b31668393fbf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM21864602.