Jack Leon (born Judah Leon Aronoff; 24 April 1905 – 9 March 1967) was a Russian-born British dance band and orchestra leader and conductor, of easy listening and light orchestral music. Life and care
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 0xf5deaf7977b937c47e8b5eeebd61b0d467fced796ae9c4489e26f514ae902852. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ceaaa552-b966-44a6-821f-92b6ccdce5ee.json and https://artists.proofprofile.net/proofs/artist/ceaaa552-b966-44a6-821f-92b6ccdce5ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Golden Age of Light Music: Contrasts: From the 1960s back to the 1920s - Vol. 2
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 0x40c080a5150a11b21a698686f9b2cee967baf610f448ec5d46563f5c58c41ba1. 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/CH6631452302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0562eca46da5d79da4ef65bcad5b48b5fda994edd333767daba82a826bedb84a. 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/CH6631452304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41f50da21e4b975587f5351e17092e638eff1f2852be3d83a56d1da4c6e370b. 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/CH6631452312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401606443e07712646c2593f973635f47422635ec08ff2625f7fa0839e2f1922. 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/CH6631452313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178d2ba6ed4a09a424aa9c7eca94c23c17b959e9f256a4680bcf9d0143a52486. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CH6631452308.
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
The Golden Age of Light Music: Grandstand: Production Music Of The 1940s
The Golden Age of Light Music: The Show Goes On
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a29681114b627d96f30a400ab96ffc4a329d1a16aee4a7f37c046b9f5db2e4e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH6630854901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b71444f6904d1a673b6d19ef236e5cc217cac5c7f67eb70a2e6d7c1098faef9. 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/CH6630854906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012d334ac354e98acc6782e6ee32c1caace28277ea2c1ad31fda2d4b56b70ad9. 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/CH6630854910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8c6f423aee95bf04f84ff8ccd08d06cfc7839f84d5afd08e1bf8d1653c0a1b. 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/CH6630854921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534f268cffa13c8cf67b02c84adc85a6460e8463d79dfb9fb83f5555f5f98bce. 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/CH6630854924.
The Golden Age of Light Music: Childhood Memories
Roger Roger And His Champs Elysees Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dc0192e34638b88642712c182a3dd86b1e80ff5ab052021d5ce16b4aa1e945. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH6630652506.
The Golden Age of Light Music: Springtime
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27b3c3856aaff6e0456234e6439cced489d1d6cfad47a5690dd999ace90d1ba. 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/CH6631451607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a9cf68c6b9d3932eab4f0314c4d3eca2a4f9c20010e3767cc3abfece3673b7. 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/CH6631451610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67049b98c91631da2f1d9c0d5690698ccd3142f1fccbb8067424e28918e18a5. 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/CH6631451611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa706ce7bd8d05f44f7fb4a7dd7e247452f5ce4c2dca85a9bee0ed51e621d072c. 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/CH6631451613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f46882ecbb75fe06719e4a41d1a30c045443fe6468fd59825276725a7eb5dfc. 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/CH6631451615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00b8666e6561e8fd3ba26c28c9614331f1bc154a00a50a539ba7062cecf424e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH6631451616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6eef217c1e49223a4c29eb9dc93c173f6bc557919e5ea4bdddf0e2943bb3bf. 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/CH6631451618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd38ec43976494540fc2d518e990d1a3815ff8ab7f2cb574e41e360b3437f5c8. 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/CH6631451623.
The Golden Age of Light Music: Bright Lights
The Golden Age of Light Music: Joyousness - The Music of Haydn Wood
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8862a6f0202e587d9d0108178e166ac55c9b9dda8ece674a5c373e8d246a0302. 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/CH6630652105.
Tower Hill (From 'London Landmarks' Suite)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51896556da7249b44aa6fc20578a2d9ccf02f98a8dd2c09f2243ae206285b8b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH6630652116.