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 0x3899796aad23a83b13ade85bf767717c85458e7df2b60b3dce17283b9c4de0df. 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/40bfee76-899d-40b2-a5f4-85d0de4e61a6.json and https://artists.proofprofile.net/proofs/artist/40bfee76-899d-40b2-a5f4-85d0de4e61a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Janáček: Lachian Dances, Fiddler's Child, Jealousy, Ballad of Blaník
Legends & Light, Vol. 2: New Works for Orchestra
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 0xd64e4147f9e9fa53eb3637961ee633fc39e9743155ab17d3026577edec0add22. 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/CZA160505631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a139312ee80700814c677d9ba57d1ac79a4c7d235605488bb1ff79decf1b96. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZA160505632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064fa2ca910e4d59675c14d3ea2642a601e77b0c75e92c7c9fc6e40a81aefcdd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CZA160505633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d68be50fdb5cbb6282132a90e111aeb184bdcacada21c3598205bd6caa2067c. 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/CZA160505634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd83fd2aa0091aa6fccb087a475d1b59655e38a942d50b827b267163d6808142. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CZA160505635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2a1c3808a4db2ae5bcc2fd0b11ea2cba5312dc0d3a95ad371be9ca4e1c5ed6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CZA160505636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e92c3387892ca1460781389704f10911cce43ae0f9ed618ca893c4c164c804. 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/CZA160505637.
Mussorgsky: A Night on the Bare Mountain - Rimsky-Korsakov: Antar, Op. 9 - Borodin: In the Steppes of Central Asia
Milan Pala Plays Alfred Schnittke (Live)
Concerto No. 3 for Violin and Chamber Orchestra: II. Agitato (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a5542ae868b3b7739ebae69b69c50eda25aacf5cb71fd16f7e12c604d5bdb9. 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/SKB262119702.
Schulhoff: Symphonies Nos. 1, 2, 3 & 5; Concerto for String Quartet and Winds, WV 97
Gershwin: Piano Concerto in F Major, Second Rhapsody
Piano Concerto in F Major: II. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50c5c29a60f9545d23797d245f8945e739cc45413511d8f3b90f568501ba9f5. 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/CZA168202947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6be675c86491df4c03b1dd0eb19eeeea98c6bd55e9dd402cd2038569806bc5. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CZA168201947.
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
Piano Concerto in F Major: III. Allegro agitato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f4c99e7019aeec247f398108fe0583df26185a31039b5b205433f12a230072. 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/CZA168203947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289c1b9a7aa8e3eb26788d8c82f9b3a51bcafcdde24ce55656f029f30c594e37. 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/CZA168200948.
Chlubna: Brněnské kašny a fontány - Kvapil: Z těžkých dob
Týden nové tvorby skladatelů českých zemí 1972
Dvořák: Symphony No.6 / Symphoonic Variations
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5066aeab53fb7b94ddcee7d9488ceffac88b08ab707fc8ca8d13c40eeca7ef4. 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/AUAZ20800696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b28d75b9d31b8bf4a3c323a1eed916cd8cbd43e93b2640528baa9e74ad6cb0. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/AUAZ20800698.
Beethoven: Vollständige Schauspielmusik (Live)
Jan Novák: Choreae philharmonicae, Ludi symphoniaci, Elegantiae tripudiorum
Dvořák: Cello Concerto in B Minor, Op. 104, B. 191 & Other Works
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2da7b361fcfe18234036e4c8110d8f7fe1d21f8c5394fd027791911848ad1c. 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/QM3FL1800091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3abb893955289b569eaf8c6221358deff8b5020d5e039413d409809db45d5fb. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM3FL1800092.
Cello Concerto in B Minor, Op. 104, B. 191: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb49b77e937c24a9600803e04922feefe108044b0b34ad9fa54a16bc18a24d1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM3FL1800093.
Cello Concerto in B Minor, Op. 104, B. 191: II. Adagio ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8b38d0d6b808efed7cff7ce87005ac16119713631fdeefcfa2179c87e3c267. 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/QM3FL1800094.
Cello Concerto in B Minor, Op. 104, B. 191: III. Finale. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f95b29921fa754953ea33c978632a44dae233cdc8f537f3a9367a66227ab8fa. 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/QM3FL1800095.
Desyatnikov: Sketches to Sunset & Russian Seasons
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4ea980746350d34820a4c7129c3742a5147c4ef8b14ee6067b81a712ac023d. 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/CZD701773801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a0f446a03ef725a3f3fe935a25d144a35429a587dc4ea7d427c896601dee1b. 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/CZD701773803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28bd64ae02b3bd6c10b2cca244b8fe09d588ade69d0643c0155e51d374f5b63. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/CZD701773811.
Symphony No. 3 in E Minor: Concert in Three Acts
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936d29584a845164493300607868caf492456a8e892df82738cad9aeecd78658. 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/NLG620460016.