Gordan Nikolitch, also spelled Gordan Nikolić, (; born 1968) is a Franco-Serbian violinist. He was the first concertmaster of the London Symphony Orchestra for nearly 20 years, having stepped down in
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 0xde301944364dd6056865d1bbf969cba1bba29b3be1e15560f824433a72dac359. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ae7c6c8-ef2c-4ba6-8f3b-f2aa995cfa26.json and https://artists.proofprofile.net/proofs/artist/9ae7c6c8-ef2c-4ba6-8f3b-f2aa995cfa26.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Beethoven: Piano Concerto No. 2 & Triple Concerto (Bonus Track Version)
Piano Concerto No. 2 in B-Flat Major, Op. 19: I. Allegro con brio
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 0xb41dc2952ab7fbf66d6884a40380beec42dafe8406a0c5fdc711ff581527e1e1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBDGQ1824501.
Piano Concerto No. 2 in B-Flat Major, Op. 19: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc075acd3643f5ef8b22ef70fecb92a936e82704fe306c7345b73919a6893a1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBDGQ1824502.
Piano Concerto No. 2 in B-Flat Major, Op. 19: III. Rondo. Molto allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbb433d5c549f52a5ea1f267ac369c33500b176c69d6dd5c580da8c32f4c646. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBDGQ1824503.
Triple Concerto in C Major for Piano, Violin and Cello, Op. 56: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf473ec165df7d8e276bdd12f29558a1f0ccdca9cf81cdb5ec94fd3200c484fcf. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GBDGQ1708101.
Triple Concerto in C Major for Piano, Violin and Cello, Op. 56: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47b2c7308a63bf58404a2a65d7d8a216113b2885c5cb696428d9feb5b390579. 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/GBDGQ1708102.
Triple Concerto in C Major for Piano, Violin and Cello, Op. 56: III. Rondo alla polacca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af8076674bf40a2cbcecf5f498934d756964571630c873c1b8af41a605a944e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBDGQ1708103.
Tartini: Devil's Trill Sonata; Violin Concertos D12, D51, D80, & D115
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd85e93074aba1b9985da157c76528434790f9043155e62094d7fd068816d52. 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/USX761528301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c050851b63fe08acf2c1d0f4a081ad7a66b20ea3c8bbcb5cc9599249bd6f5c0. 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/USX761528302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c70c8cdfba41358f25516a198561cf9d4b799c30e44a62ccaab42ad134ba34. 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/USX761528303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6225d5fe19aebe0277e819598cf545406b8167c1aacc0ebce9440154f13fc5c. 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/USX761528304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a7c0056b480d464e2de03ba6b00fb2d285733e26d2405cf8691118766d8410. 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/USX761528305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffb6951802e7643d00339565cd3da80f59aad840e176c4540829a25183514e0. 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/USX761528306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6233ce05aa6aaad35b6a6729ebe815950e6932c5f107df6986cc7933f44630. 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/USX761528307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf161025a1309bc7c854b1d8772bcc47591e9bf84f5762500b160aa5d3a388adc. 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/USX761528308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cd9e0f899a98edb48dfbf3b696898ac560f23b4265744fdfd7b70fa2c0487f. 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/USX761528309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09feb064699899434e9c64db3eaa88e495c5f745cb1df2d3c0daf16bc9750d6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USX761528310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ad2533d7f0135c7410b09a3a230924419389b54a7d61ad8b814549f8da03a0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USX761528311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fee34fa9bc0507f9f31d7cf3a6cf6b16257700438d7017c99ac832748c18d8. 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/USX761528312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f23604b3890a1d9d63c8a8d63c6cf6480a31ecebf261f4c31e284234e53e960. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/USX761528313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4275ffda1de0ef56d436783ac5a78b4848f6e358b82264c99ac621e60c3bc95f. 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/USX761528314.