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 0x19e6916752576b665edde6050d36c4bc90f38978774994a7f5fac2df31993ebf. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed6e9867-74c2-46a6-9d79-d9b6fb7481e0.json and https://artists.proofprofile.net/proofs/artist/ed6e9867-74c2-46a6-9d79-d9b6fb7481e0.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 0x27a229bc15d4b095f986ad9461a86494a5ff7f8033456e11750a0744a880c154. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:22:04Z), 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/QM42K2581898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9884c991fe0b47891c2b2d906a84f4f5261afd45e6c7f7ac91a7c103cadd01. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:11:28Z), 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/QM42K2543410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514c936521046d544c6e2573d518bb2397f275780fac4bee8f8b2881d7f38876. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMHL2516597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ddab4c3c6d3f8427abbf117644102193e80d65c6489417f974dd0a32ac59cf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:21:31Z), 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/QZS642548940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25574a9c1ae8c123ea7765560ff4bfea84ebe3895ce87c2e6d35c41e4808357. 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/QZMHK2580989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06926af774edaea40f5e25158707a99dbb317cc23a8cd663e6d35788ad7141aa. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:25:28Z), 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/QZS632589407.