Craig Leon (born 7 January 1952) is an American-born record producer, composer and arranger currently living in England.International Who's Who in Classical Music 2005, Routledge, 2005. Leon was inst
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 0xe5a3ae2c284477a5870913d2a843d1e413ef1fa0ad79e09960ce50c4326c7fb4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcac1e96-ec90-452e-a2cc-d4782b6b04fb.json and https://artists.proofprofile.net/proofs/artist/fcac1e96-ec90-452e-a2cc-d4782b6b04fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach to Moog (A Realisation for Electronics and Orchestra)
Violin Sonata No. 4 in C Minor, BWV 1017: Siciliano
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 0xac72627913b6174c5dce83362aa767fcfa36dee625ee3a7f3205c6ecc5d218a6. 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/USSM11501197.
Ich steh mit einem Fuß im Grabe, BWV 156: Arioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86540c32b7e8d6dd9217dcd05dbacd300e2dd9216b067c1db0abb296335c15ee. 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/USSM11501200.
Orchestral Suite No. 3 in D Major, BWV 1068: Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d38a4a3f1c0b74e0cd735a94bbd2daab98d52a3b89f757c8aafa24b3605724e. 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/USSM11501204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4562580843c3930f119515ef8ef15ebd63e032ba0b0785e36f56991f009f5b. 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/USSM11501205.
Violin Partita No. 3 in E Major, BWV 1006: Preludio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619d06495e9139cdc0ae7bdf57af738c31ed2b16ca17e5679f459a6ad6c7e34d. 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/USSM11501196.
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
Herz und Mund und Tat und Leben, BWV 147: Jesus bleibet meine Freude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6d2a2809d3b9851f2b1458c0e8a67b553d861746b52fb925f81f1d74a055cd. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/USSM11501198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2216a9e2f7233983d4c5256e5cce368e4ce04f6bb488c7f9e4c1d5a168979e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USSM11501199.
Brandenburg Concerto No. 4 in G Major, BWV 1049: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19ce47e0196c801ab894b7d80aeea691469cb91aa40d3891eae052692228803. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USSM11501201.
Brandenburg Concerto No. 4 in G Major, BWV 1049: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c707546ff8c28acb32904c0a70410d212309569c967b861a9b12afb377be0d. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USSM11501202.
Brandenburg Concerto No. 4 in G Major, BWV 1049: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bd30661873f5a026ac66ab2ff0f08be21e5037917b53a69e2de9bb853f14ed. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USSM11501203.
Fourteen Canons on the Goldberg Ground, BWV 1087
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac4a63d9acbcdb999746565278dbf04fa39ecf81b902998b71d579b14a335cb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USSM11501206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9df80bf4b1b317cca1e707c78df3361d7b04de441810a13b6a555e53d12e90. 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/GBAYE0601675.
Mediterraneo - Arr. Luis Bacalov: Mediterraneo - Main Theme (Arr. Luis Bacalov)
Orchestra Sinfonica di Milano Giuseppe Verdi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00831396643a365a5f7cd7a2acefe7615e09da74d0170bfb2d77274c2db9ad04. 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/GBBBB2002805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18853f2077fdecdf72968b205b11a84a7c1d2c9506fd6eb6664e4de3a3e6e8e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBBBB2002807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96049948bea238702cc850d9fff8c6213cbd6ca475867874d5c49423a5da3cbd. 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/GBBBB2002811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c1055f45146d9149458277c855fa36c90bd6258fd6bc781290c244555d17ad. 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/USCH30100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77450dd8271973d004dfbe3d0db7636ea63648df80571a92ea89bafd3866497d. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GBAYE0601732.
National Radio Orchestra of The Netherlands
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dbaa2fbefa071855f2bd40f097d5be648debb3895361b1ad2f0d6788209aad. 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/GBAAA0200450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4117d953a2b50c9ed0795ea764223d2c958c53136cf9ea836f4c327ae19ce1. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/GN6NZ1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a178f75c136b6ae9193439e476e54d15f90e50124199def25e128f366e4babf. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBBBB2002809.