Marty Ehrlich (born May 31, 1955) is a multi-instrumentalist (saxophones, clarinets, flutes) and is considered one of the leading proponents of the 1980's New York City "downtown" avant-garde jazz era
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 0xfec248a29c53433f63daf56f959a3e83e1859e854564e4b14efaedac91998422. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6e8972a-5202-42e3-869e-b6bc939a69ef.json and https://artists.proofprofile.net/proofs/artist/d6e8972a-5202-42e3-869e-b6bc939a69ef.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 0xd6fee88b3d4cd5ae8184513fde6e19c5b205a9a7680665af01843b3cf2ab4451. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US4QP0439705.
Julius Hemphill (1938 - 1995): The Boyé Multi-National Crusade for Harmony (Box Set)
The New World of Jazz - Naxos Jazz Sampler 2000
Mike Nock / Marty Ehrlich: The Waiting Game
Muhal Richard Abrams and Marty Ehrlich: Open Air Meeting
The Enja Heritage Collection: New York Child
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245aca1274e6de027dc8500f29ac6035a4db18e1c82b5a545827f0d084079519. 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/USY871300019.
The Julius Hemphill Sextet: At Dr.King's Table
Muhal Richard Abrams: One Line, Two Views
Leroy Jenkins: Themes and Improvisations on the Blues
New York Jazz Collective: I Don'T Know This World Without Don Cherry
Marty Ehrlich's Dark Woods Ensemble: Emergency Peace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356b585ba124292b4b46e5f78d4eac30d32f5afd818d410e5a897ee19e2ee088. 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/US3Q52510901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e18addddf6546ed2820b6c96b6b438b8c474529eb3a6fb19334f18ce81c0f90. 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/US3Q52510902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ac5b0202f6cafca18b47a8d0936ed12a325fb87bf52937e35f2e53247fb33c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US3Q52510904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9593d582674fe0c6abc25b5e8bd1602102babfa09b529b174c4397ea45c8879e. 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/US3Q52510905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0feed02753655d1e6030d6dba5b1852034b7630dbd6bf73ea4f7c175e049e882. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US3Q52510906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c93053a3399812e24254af85a79af74a42e6936a1f3650ad3ae10f90ad04cd. 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/US3Q52510907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5db9d049b0d09d1c18b32326503e37951fd25643c48da80cad618b81aaf48d. 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/US3Q52510908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e474097ba56e443a45e809b56e19a2f5134b05c519ede7da226abccebc79cc. 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/US3Q52510909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7ad8a5601feaa4c58c4d63f5bfa80149ebc258aac8af867eb515ab79085eb4. 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/US3Q52510910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8c1aeaf32ee472ce1447261450da063ae03addbb94aa081fcbad834f9f5bef. 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/US3Q52510912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0031bdf12d047c1ccd8069964c49f41e63b7cfe677ed949d2fcbb273fd2a3173. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3Q52510913.