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 0x21254a8d65eb191615557eba04cd88e96b5e5b592836042844d485e3ebd30db9. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1997e621-18c6-404f-81ec-7976d4ad85ab.json and https://artists.proofprofile.net/proofs/artist/1997e621-18c6-404f-81ec-7976d4ad85ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
M. Haydn: Mass & Vespers for the Feast of Holy Innocents
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 0x05f6a2549fa3a493d88f9323b90a1c85f864cf66d22d6f660d7e49d32f678b2a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA41847170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7012dc7c4dcb8622f0625a4a681af92f3cd84a66171dc46383228a41c6b0fa6. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZDA41847171.
Battlefield of Love (Per Aspera Gentle Vision)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a02f2536f085ea71eeb19690efd5fefd7210ff5af86e9b4a0a43b285fbf8336. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA41847172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67e7687161de96d91838b5972d3dc943ae923aa74905314c58916684762ead6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA41847179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cde0bb0b09c06dcdd2af911f6f40231b9ef104050e6ee2390b72271aab5bcb. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZDA41847180.
Getty: Goodbye, Mr. Chips (Original Motion Picture Soundtrack) [Excerpts]