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 0x2e553312c96c9045b19bff975a57f46239f42119379c1bc82773a331abdac5fd. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9c121f9-ff8f-453b-badc-32474fc7505b.json and https://artists.proofprofile.net/proofs/artist/f9c121f9-ff8f-453b-badc-32474fc7505b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rachmaninoff Live – The Piano Concertos & The Paganini Rhapsody
Rachmaninoff: Piano Concerto No. 2 in C Minor, Op. 18: I. Moderato - Live
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 0xc1030855813a641d2f5d67fd6ef392af0179829afddef5c16f1664bc71a88ceb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:18:46Z), 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/DEU901502486.
Rachmaninoff: Piano Concerto No. 2 in C Minor, Op. 18: III. Allegro scherzando - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee0da2cd702e671caa7bd595dd71c3b13cfb2fbb9233739b7b68701e6cc27b2. 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/DEU901502488.
Rachmaninoff: Piano Concerto No. 3 in D Minor, Op. 30: I. Allegro ma non tanto - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2d24636b4f77764b2bc9f91bd87d475ac27071dd1d8bcf06dbff6211ea9223. 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/DEU901502489.
Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 5. Tempo precedente - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6d8776d69d72b0b32224e2cecea2e55ebbbc59c5edc601057487827be69483. 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/DEU901502504.
Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 6. L'istesso tempo - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a9d64932f9d86cafb84b6a007c69b1ef9414bb8464766c52dd9303a0fbe2dd. 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/DEU901502505.
Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 11. Moderato - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb7884a69dd6c12ffa6c980953bbdb5f8bc21b091a998723197ecb00e6c87f8. 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/DEU901502510.
Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 12. Tempo di minuetto - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5849939351f5726e426c72f1fdb02e787f9735e848116666acf17d81937ec0. 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/DEU901502511.
Rachmaninoff: Piano Concerto No. 2 in C Minor, Op. 18: II. Adagio sostenuto - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92120d06840496565d65761fbea833a82377cbb436edb7f1a6f78d0fef69cbc5. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/DEU901502487.
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
Rachmaninoff: Piano Concerto No. 3 in D Minor, Op. 30: II. Intermezzo – Adagio - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1011ba3e558eb7b49f10c4004d952213f099183c9acfc6e731f01de9af256dfa. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEU901502490.
Rachmaninoff: Piano Concerto No. 3 in D Minor, Op. 30: III. Finale – Alla breve - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd171247b56dba58942256d82ede15d0b5118489c4da3d3b730bbf6a57144585a. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEU901502491.
Rachmaninoff: Piano Concerto No. 1 in C Minor, Op. 1: II. Andante (1917 Revised Version) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5047988608d27f91aceb374149991d5104acefe4a7745bd104214defe3b6421. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEU901502494.
Rachmaninoff: Piano Concerto No. 1 in C Minor, Op. 1 : III. Allegro vivace (1917 Revised Version) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5693a3ac8a63399e393d31f4310b005077e36a93e88071ca98897b4baa669ff8. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEU901502495.
Rachmaninoff: Piano Concerto No. 4 in G Minor, Op. 40 : I. Allegro vivace - alla breve (1941 Revised Version) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2018f5548e9ae7597827efb28edd2609fab49414f00775b6dc030a056bc0fdd. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEU901502496.
Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 4. Più vivo - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df2e0fcca1134bba176168a26fc4318f99987bb1da0b4ba570390a5f8769d9d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEU901502503.
Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 7. Meno mosso, a tempo moderato - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b64394e3ad29050b68ff02cd957df6cd13066beeee7b9d354afd3ff70c48f5. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEU901502506.
Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 8. Tempo I - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f45497bc80c60e09377f105f903e65efd8a3e457418ae05146f636492076c7b. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEU901502507.
Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 18. Andante cantabile - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d75132d3a0ebd71979aca2e0c748276355ac7216bab9a4400bf204b8691191. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEU901502517.