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 0xca7cbf109951d0ee5e457ae734195f6c908385944f52759b9f4c88d24083f11c. 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/e2240f6c-1f00-46c4-80e0-c92f4075fed3.json and https://artists.proofprofile.net/proofs/artist/e2240f6c-1f00-46c4-80e0-c92f4075fed3.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 0x1529005db6c3d842f18ec86f73d4d4098687dd5eef372c61cb51c8155975423b. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:49:13Z), 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/USMC18828489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09dd0da77af9b1490a0c26cf1f11a4cb4a732472bef90434df19c75842c4cb2e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USMC18828490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2022a3c101af72da3bfe80158c37d26af85c5b5ec24f67fa2ab118b6331e5d1. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USMC18828491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06616da6cfa239df67792884067c3048fbe55398edf005abf8efc392526dea0c. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USMC18828494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fe46cf1b981eecb3014e56e8470517fde22b489825fd78eceee5c2b4b19124. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:21:42Z), 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/USMC18828495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a49cef9321ec107bcb2b448abee2b8fa339ec2cfd7ce6a331eefeff53124803. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:48:23Z), 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/USMC18828496.