Jay Mumford (born Jarrett A. Mumford; February 26, 1977), known by his former stage name J-Zone, is an American record producer, drummer, multi-instrumentalist, former rapper, and writer from New York
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58efe558084affe0e9451f765f1eea54053ece687b671f4bc1af6e3191794203. 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/150f32e1-86fa-4ce7-8daa-06a3d7ed7733.json and https://artists.proofprofile.net/proofs/artist/150f32e1-86fa-4ce7-8daa-06a3d7ed7733.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
To Love A Hooker: The Motion Picture Soundtrack
Presents: Chief Chinchilla...Live at the Liqua Sto
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a12f6dbc485a02e7e02a15884f8b997fde7de4b39011c05ba6df098298ef7d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USA2P2334002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0047650b2a9559453ec5c15792150f2f4b7e6446e419622b97b94c736ed0b46a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBBPW0300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c66fdae28545447620ca48345692d9a5c2f7cfa141b062ecfbcbcd82ca1cb5c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBBPW0200171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64de74f08b042c3ca4fb9cac04e8e366b417294e281f227671293a09f39201ae. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBBPW0200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8470b51aab92ece3f7f78b336dc4a2635f51b9e5e95ce20b99f3061efd7b1e24. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBBPW0200175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a01becbbb59f3d6fcb99db10a9b119e6acbbadcc350123de4811da238d64e58. 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/USACX0800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a005bf34bdf82b84cd40ff628b7171e25bedad0efe5cfe7a57f8b869483436d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZMEN2132516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de07f986c077ce85e941425aef602cce97b2726033c2788d5f25ea43d5a21b8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBBPW0200193.