Frederick Dewayne Hubbard (April 7, 1938 – December 29, 2008) was an American jazz trumpeter. He played bebop, hard bop, and post-bop styles from the early 1960s onwards. His unmistakable and influent
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 0x41908b4086a9ef9d59bac487efd5aaf5b105088a1b446c96ce820b6584d269a7. 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/b186d61d-62f7-4188-a843-77ec592732f5.json and https://artists.proofprofile.net/proofs/artist/b186d61d-62f7-4188-a843-77ec592732f5.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 0xa1968a21433a375d8f7a2caf027c0ef5844c54ce9f53821c7fa7090bfd538c59. 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/NLA418418701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1d3d2b9a7f0e37d16f3256bcd9d4fd39b61bbfd4cf51218e0a932313673443. 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/NLA418418704.
Ugetsu - Recorded Live at the Keystone Korner
Reliving the Moment (Recorded Live at the Keystone Korner)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661be4bfe208081474483ceeb49faca66638bac52b7b5acb901a7cdf1d3d5d76. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHNR1426503.
Byrdlike - Recorded Live at the Keystone Korner
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3e0e1eda76848e2df8525ddd6d038f131323f8af34920c969c83bda6e7aa03. 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/USHNR1426505.
The Classic Blue Note Recordings: Wayne Shorter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb0fd2dba93772ed902dce124447f4dd8a04eac5869ef47eb5eb25e6f1fc368. 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/USBN20200328.