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 0x2f069b9a68bd3927119ee40ef46d0eecfa7bd6ed56fff74f6f135d5445ef189c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4239bf16-c780-47c2-aa23-cea9f8a58cc3.json and https://artists.proofprofile.net/proofs/artist/4239bf16-c780-47c2-aa23-cea9f8a58cc3.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 0xbb52bab6e178da04ccc237e9a4ba4d9a7c6d7ff1aa2f0cf2f3a4f0a907f1ce29. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA71943775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0cfb0662fe4430a539e24eb9f299608f0093fe4d8bbaa3ef948626a435e49e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZMEQ2334506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea609f5940bf5a8c8868e070a70327203e39a8b9b3f2c6f18e9255454ad0e6bc. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:41:19Z), 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/QZTAS2318097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c08bb4216c4502fe57c7a6e2d508be732a5394a12cc28b93f683d978340815b. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/USHM22493010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fbba344f94ad6807019cf93029e6018327d2639616ee3d2e2739d95448b545. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:11:33Z), 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/USHM92401059.