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 0xbdf7b558948dfe471c4cd92f314683dda9f64a4285260231ea2367b2f061b56b. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dac864f1-d5d6-4e26-8446-458fd50bddb8.json and https://artists.proofprofile.net/proofs/artist/dac864f1-d5d6-4e26-8446-458fd50bddb8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
John Kirby And His Orchestra Selected Hits Vol. 1
John Kirby And His Orchestra Selected Hits Vol. 2
John Kirby And His Orchestra Selected Hits Vol. 3
John Kirby and His Orchestra Selected Favorites Volume 2
John Kirby and His Orchestra Selected Favorites Volume 1
Swing Time - The World’s Greatest Jazz Collection 1933-1957: Vol. 40
John Kirby and His Orchestra Selected Favorites, Vol. 2
John Kirby and His Orchestra Selected Favorites, Vol. 1
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 0x4c5f85681da30238637170287dc4bf30a83daa9d986560ea62ba8d52669cd1a6. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USC9R1704703.
More 1940/1941 - The Biggest Little Band in the Land
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08165bf2ec62fd1d2afff3c74360f16fd3f9386f450ff3e38ddc7b5dcf68c2a. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/USC9R1712511.