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 0xe9fb5f61ffd7a6266eeb6dfb35aae9f7337844e0874b3a544a903871f77e6235. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3dfa00fd-853e-4aa3-9d03-56b537e17761.json and https://artists.proofprofile.net/proofs/artist/3dfa00fd-853e-4aa3-9d03-56b537e17761.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 0xf1a3d65370d0342b77b838656c596da281d9008c42483db736c144bb18af18c1. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:43:01Z), 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/QZGWX2103138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a09010d07eac8f9299172e0cee3a6861c62585ed81b963c645088253c35d45. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZGWX2103139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4caa5ffda31c5a69f2562b18eb96be987b3b6a6a1eafa58dfca3688516848c. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:53:58Z), 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/QZGWX2103140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b7d9fbd36db426c645883f4e1ff816f8f1321e1c7ba9ea8afcf8a42ca448db. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:27:04Z), 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/QZGWX2103141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12977d27ba96d520a92650d40a1edd8b516562bea40601f64a0e0241409fea0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZGWX2103142.