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 0x17d8f4a3d4369271d425e4c77dbcf8eb67f447cd71329bd0bb6cf06a2d0ac706. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d2c0350-0ab5-481c-a50f-bf459db33be5.json and https://artists.proofprofile.net/proofs/artist/8d2c0350-0ab5-481c-a50f-bf459db33be5.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 0x743f652be91653299249b173c21168ccdb1cddd24ff0df351aeb12b8ae7e6a8e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZES62574065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa04d4c45183cde4d3ba5736200f7eae282c51f906e555f78bbd837f895d8905. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZES62574066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29586a178a7e8e6f5c71c39bc7394d56f605f355489394513a3da2039cd8099. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZES62574067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320d8f2a3ebd2ae15df04a9811ce7e3708a1d09acae03bd664a2c49959ea6621. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES62574069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa67a83b30a8f16bf1fca9634ba080d4d9a68abda6897190d8551a34b8ef57a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:28:15Z), 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/QZES62574070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0539ca5fd25bc2ed3d80f244bcf8638f197cb56594660271d226bc6cda6975bc. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:47:38Z), 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/QT5M42505096.