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 0x665355c91f6bff1354cfde510d01fcb94beada31e7b70e8dc06955effb803dec. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7806096-4736-4205-8c8b-3ffe32eedd71.json and https://artists.proofprofile.net/proofs/artist/f7806096-4736-4205-8c8b-3ffe32eedd71.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 0x8d31e051606b30c7c7a8dcc0860151a29044a05521c59b96890666ca57bcdc5a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BXKXM2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3127db302321fd3a1932ea57680e6ad8f0a7dd23784dd20991be998a01262c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:07:23Z), 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/USCGJ2355068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf8525da2a858a0d0d9c9814f70b541f670337eea8c394d8ac52cea903ed75e. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:43:19Z), 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/BXTBP2323557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3dce7de20140eca3773a05313d9e4a612bf27024b7838fb54a1dabd94b3721. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:32:43Z), 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/BXTBP2500001.