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 0x843f266f02f414c7c5beec3ec97352a61dbceefee36440cdea11b797100dcb83. 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/78a046cf-64ce-4120-a775-6cef0315d66a.json and https://artists.proofprofile.net/proofs/artist/78a046cf-64ce-4120-a775-6cef0315d66a.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 0xf84d6c4ee11b2e10cf17c79f79e83982852bdf35da7292ca36b4dd63203d053f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USUM70507308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d676f32be8d7987d9e06d50422f613ae8903e3a1cc2c151d53d6075c9c0873c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USUM70507310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22320b43b4244ecd3a1b6c48c8c20901204854274fe26a36d92653efa6c8131. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:47:38Z), 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/USUM71301809.
Modern Jazz- The World's Greatest Jazz Collection, Vol. 24
The San Diego Concert 1954 & Complete Studio Sessions 1955-1956
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf31bcb3b285158cba15c026e3e346a1aa1324377063bac86827f0bfd3e36a7. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:35:27Z), 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/ES7710741708.
Legends Live: Gerry Mulligan Sextet (Extended Version)
Essential Classics, Vol. 904: Gerry Mulligan Sextet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fec91e5fe2d35d7263ac1ebbbe080be870808e8ce29390874d055809f513e1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USIR20080346.