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 0x8d6409650b3a54628e4a172e5f9f6e48843f226eee8850f02ab3f4510cee36f2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80695e85-4cf6-49c1-9d9f-710962c35973.json and https://artists.proofprofile.net/proofs/artist/80695e85-4cf6-49c1-9d9f-710962c35973.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 0x498068fb137939b71e761fcc3aa850417d118f0c492cfc6798ce0aab68fc94d8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US7VG1738759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39a2d6d4c646c9bd0851339c050d834ec139cdaabf677df8a233c9a5bcb5e95. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:55:01Z), 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/QZ5AB1781676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dd632a5edbbfb10c168acbafb04212d83dec3fe46b423ea34bd188757e65f1. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZFYY2021175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dd564399be4b04604c6afe3a0a9848be91c2d4e277b860e94e2343d7dba3fc. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZFYY2021181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24192d95f0ebde6f889cecf0d599830017ea81ed2a3795039577df451c58e6af. 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/QZTB62434214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b4e2e18462d2ca5b719ffa89cfb567ec2ee3eb2b59e12795b35ec8a54b0634. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:31:58Z), 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/QZNWV2487751.