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 0xcde788fd7888cc31f40f8e212ace661628d2d2fbf027cad803440c368ba5eb44. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee28c2d6-a055-4a78-8e69-07dd272d3c21.json and https://artists.proofprofile.net/proofs/artist/ee28c2d6-a055-4a78-8e69-07dd272d3c21.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Very Good Advice (with Leith Stevens & His Orchestra & The Four Hits)
The Complete Columbia Singles, Volume 4 (1950-51)
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 0x73d0a3549973f989be36ce85bb9ce3794ecbf0c4555cd46ff2693f53a3b28e84. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:21:41Z), 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/USSM10028494.
I Speak To The Stars (with Leith Stevens & His Orchestra) - Session 1
The Complete Columbia Singles, Volume 6 (1953-1957)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e866e313deb9754514140f38a53fbae9afeae3d566ed1a8f5dd860dbba8960a. 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/USSM15300149.
Golden Girl (The Columbia Recordings 1944-1966)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e866e313deb9754514140f38a53fbae9afeae3d566ed1a8f5dd860dbba8960a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USSM15300149.