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 0x4cac40689e39582c5bd88f5511c4c4d6b251a788a4dd12fee34d980ba61c96f0. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a93c6e0-df81-430e-b47f-0f1a3811e155.json and https://artists.proofprofile.net/proofs/artist/0a93c6e0-df81-430e-b47f-0f1a3811e155.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 0xbe067b31d203d7e4a8abf93f7574c9887c4aca44cf4e1f2a130c86f3f8095c37. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:31:25Z), 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/GBMA22441213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c113ea5cda0a75911087319fd8ae5c9f1db0e74a23ac2e220898cbfc0f37a8f. 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/GX53U2500395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93ca4260c12b47e69de1bbbc59bd8ba9ec97ba9597f53ba53cead6939ddaca9. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:01:01Z), 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/GXHG92533291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16cf68475ea7abd797c0c8eee5a1b6623b767cd866fffaad5e44e401316c7ba. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:03:11Z), 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/GXHND2541072.