John or Jon McLaughlin may refer to: Arts and entertainment John McLaughlin (musician) (born 1942), English jazz fusion guitarist, member of Mahavishnu Orchestra Jon McLaughlin (musician) (born 198
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 0xd2353305bf3b691962202a81fb9511400858697a9d84e559d017fd1989f53c76. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bd75cd8-273a-4393-9193-01124b7f4ecc.json and https://artists.proofprofile.net/proofs/artist/6bd75cd8-273a-4393-9193-01124b7f4ecc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
John McLaughlin: The Montreux Years (Live)
Friendship (Live – Montreux Jazz Festival 1978)
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 0x2dba1c085af5a1a54c7ae4eeb3c6f8cb5abd91f6ff89ec774222e76aa5fe4361. 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/GB5KW2102864.
Nostalgia (Live – Montreux Jazz Festival 1984)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1b981e460773936d308f759a5ca9d3640548257c2ade97e0b51d7d008f5f1a. 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/GB5KW2102865.
Acid Jazz (Live - Montreux Jazz Festival 1998)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e22650491470c519b4d465057da2f43d2c1f20b9459782b8062b2bcad51306. 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/GB5KW2102866.
Radio Activity (Live – Montreux Jazz Festival 1984)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5de60a04de2116d9d4e0f7045e1c07d8a5246d92e87751fa424eb37386cac5. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GB5KW2102863.
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
David (Live – Montreux Jazz Festival 1987)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf281f2e6ddd0b3badc407f5bee0737fd4bfc404c664f789187eaf585071553. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GB5KW2102867.
Sing Me Softly of the Blues (Live – Montreux Jazz Festival 1995)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6eba53d2883e882ee0347835f68dbd101b9d2c7e4df4a69eb35bc36a4843923. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GB5KW2102869.
Florianapolis (Live - Montreux Jazz Festival 1987)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f0cbfa05ced6627bdd1f11335cbe4eeea58c9757daaa1e9c829c71305af22a. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GB5KW2102868.
El Hombre Que Sabià (Live – Montreux Jazz Festival 2016)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9881963f11c86ef46d9c170c61931e0ca9c793c909b93f38ce8486a845980e. 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/GB5KW2102870.
Feio (feat. Wayne Shorter, John McLaughlin, Chick Corea, Joe Zawinul & Dave Holland)
Double Image: Rare Miles From The Complete Bitches Brew Sessions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd229e547064bb00a185f4a19935f5316c3b52e98a36830292a7baad0699f72e8. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/USSM17000359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed95d5817d57e1c14c562172e438ea91db182d7e7bb440a2650e23f28d93e247. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USSM19929548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf770f7d16265be2d793199b3b0087e9aab416463f265e92f3e68e6b2c4080a. 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/FRZ029404080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe009fc11c88f59155d4ef1d36119148bf227392cb3214fa720d121df9a7e7164. 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/USSM17300985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ef04f42e34269304d20f82b2f9c13fa69049f394c038e7977cc72fcaa0b5ac. 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/USSM17500465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d9271cb4793e0553fed5d3ca9c55b5336c2f0eaa6de44301f87096d6fbb0a0. 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/USSM17500466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddbc850c6cced413610225fda4f714e3086349f2383edd5fa0f2f55059b6ff8. 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/USSM17300984.