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 0x2ff8a6969b49f0145bd73ba086f899cd99a7863f032bcd6ed3b0a970c946e971. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/125b7a4b-e77b-4222-a6bf-b0e70b84dff1.json and https://artists.proofprofile.net/proofs/artist/125b7a4b-e77b-4222-a6bf-b0e70b84dff1.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 0xc3a4cba08de1411312ed2f6abab6290ddbd31176dab1df91ca9ed2ab6de31e3b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:55:12Z), 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/GBLLT2110259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7acb01b6e81847d241df2491f2565d2317b0a0c161b584d9e7063ebc4f135a3. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:35:56Z), 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/GBLLT2110260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b995ac7096033f08ffdcd204230ee6822849a7ca50b079eb4cd2a8db0020eb. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBLLT2110266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4965ac5f76a072f9ccbde328beaf8a564deff87fd5ce167226fb05be5bad7f58. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:54:59Z), 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/GBLLT2110269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc732a165c056c4fecb2fd1b20647bbe7c3edf956ef3b09f1e4e5277e4a2bbbc5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:12:25Z), 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/GBLLT2110271.