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 0xea814d61238a6728babbfe26d89ce2874c3ee9670696d9733b2c7b2869504886. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4184fe5b-8977-4dc1-be09-3eddaa7d305f.json and https://artists.proofprofile.net/proofs/artist/4184fe5b-8977-4dc1-be09-3eddaa7d305f.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 0x783dbba60b35acdd743e5d4d6efdd3920c2356008133f2f689874dfde763e556. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:57:55Z), 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/QZPEW2512497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f945ebea1d8141c362a7b4f46d1c4576905e4dfeec8209591fb27926541f9c3. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZPEW2512498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027a90a595c8cb9ca63c4ab9a756d0a9b8b09a5f1ff536a8f0fe0ccbf2ac740d. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZPEW2512499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55d6f8155e9a5737aff423932a3e5243c4d6e74f86e03c25ef359c51dc5d136. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZPEW2512500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb9ba0222f6ca9ed3a7a4d95fdf6457b88c879149a69ff29ac79d9646eb8074. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZPEW2512501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5cbeeb4398d3a14340ac0d2a1501a706391e9d3b69f5e5836b1096f8b0a468. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:40:46Z), 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/QZPEW2512502.