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 0xeecdf8e3a2bdbd05af88f1e854c62b109c5f0062cab04968d054a983d11e0160. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5105a53e-c379-4eed-8afa-f78cd3cb46b8.json and https://artists.proofprofile.net/proofs/artist/5105a53e-c379-4eed-8afa-f78cd3cb46b8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pascal Dusapin: Passion (Oper in italienischer Sprache)
No. 6, Lasst uns Liebesrosen brechen (Aria & Chorus)
Handel: Ode for the Birthday of Queen Anne & Dixit Dominus
Gesualdo: Sacrae Cantiones Liber secundus
harmonia mundi - Spring Summer 2013, hmnews
French Suite No. 6 in E Major, BWV 817: V. Polonaise
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 0x5e3770b2ed61f4f950a39aa811ee8362433d195ca35d5e569232531626ba9033. 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/DEF059304405.
Aria variata (alla maniera italiana) in A Minor, BWV 989: Aria da capo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3212ce4098a4f1e96b048d80c9859b64f05663787e9b6ac5c97695848cff0d51. 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/DEN961830323.
Sinfonia (3-Part Invention) No. 1 in C Major, BWV 787
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fa4d90219af8086aa65fce9b6ee5befb99666889b213f4260effc0276afe58. 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/GBBBA0741610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0adea233ecd64bae803d1469028022c1758aef02f0b141a8e9ecf3593de90e. 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/NLA509509003.
Suite in E Minor, BWV 996 (Transp. in G Minor): V. Bourrée
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcff0c74f30866afa03791c1e5f5361093ff3d78d572c1aabfeefe84f5a71d24. 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/DEF058301155.
Sonata for Flute or Violin No.4 in C, BWV 1033: 3. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3d8d5f52a536f69cb18bad9318de31c4a8f1474465fb911e8aac177971b289. 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/NLA508702304.
Suite in E for Lute, BWV 1006a/1000 - Arr. for Guitar: 5. Bourrée
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7d4f239bcfbed6c83c3ebf4e88af5b4b2fd724f6630b125e1c3f9d2ef1f260. 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/GBF078711525.
Das Wohltemperierte Klavier: Book 1, BWV 846-869: Fugue in F sharp major BWV 858
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daa95b0e3f47e98b2cb646ac8fe685d50be0f522adafb9a873dff553d78f1f5. 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/GBBBA0540526.
The Well-Tempered Clavier, Book 1: Fugue No. 17 in A-Flat Major, BWV 862/2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6538ae719f75c950fb4608c485ee0e60620fb0475bae2e1b170a4d75d9f40a3a. 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/DEN960731107.
French Suite No. 5 in G Major, BWV 816: VI. Loure
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf117797b03d587a91b6ebe287b927cfda7b3108f5c400d85eef2242be0c593d. 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/GBF079111146.
French Suite No. 4 in E-Flat Major, BWV 815: I. Allemande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acde47db4bc93d578404f3050475e5eac68f13176fbc3ebb301511bd06ac385. 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/GBF079111131.
The Well-Tempered Clavier, Book 2: Fugue No. 7 in E-Flat Major, BWV 876/2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fcbdf33c601ea0a04929a9ae18bf6b1a0ba391fa04d9fae4b6870cf2b7447a. 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/DEN960701013.
Gottes Zeit ist die allerbeste Zeit, BWV 106: I. Sonatina (Transcr. for Piano Four Hands by György Kurtàg)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9be1abc0c969d3dc95c4434487a64cf7c23be285375e359855f423b41acfb4. 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/DEN961830336.
Sonata in G Major for Violin & Continuo, BWV 1021: 3. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e4a1290ec5a1de357f74373495876544077c23d726601e0dc338026b98b753. 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/NLA507920312.
Notenbüchlein für Anna Magdalena Bach (Arr. for guitar A. Lagoya): 26. Musette in D major, Anh.126
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6ca8d186f8dc1857510894d327c00aab22e2cf914839cbeadf7dd53e880a80. 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/FRZ037102230.
Suite in E Major, BWV 1006a: VI. Bourrée
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8884e219329d2c3586b24c747470ea70d8dde74c3973f25341cfd34a9e8a9c82. 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/SEA038102015.
Prelude & Fugue in F-Sharp Major (Well-Tempered Clavier, Book I, No. 13), BWV 858: Fugue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744afe97c3c6e5986e2ccd00c072e30ce5ee0e9afc7fe794d59543e9eedf435d. 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/DEF058000702.
Suite in G Minor for Lute, BWV 995: III. Courante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb9959b26c14d8b09b162020af7790712cfbe6e6784f9c5d0a99a56912c258a. 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/DEF058402813.
Gottes Zeit ist die allerbeste Zeit, BWV 106 "Actus tragicus": I. Sonatina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4abfc0cf0705f5031cf4f7e5154b668cbdbc368729c196e1facf50b747d3afe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEB339661913.
Trio Sonata for 2 Violins and Continuo in G Minor, HWV 393 "Dresden" No. 2: III. Largo (Arr. for Oboe, Violin, Harpsichord and Orchestra by Andreas Tarkmann)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934beeeabb07ed311242ebabc5b319c5fbc4f943e3bda497f0ce47a42097bbd5. 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/DEUM70602307.
Beethoven: Vollständige Schauspielmusik (Live)
Ronchetti: Lezioni di tenebra (Reduction from the "Giasone" By Francesco Cavalli, Abridged Version of the Libretto By Giacinto Andrea Cicognini)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618e0ca006730bd990cbad0c921728c51e24f6545989885bd0adcb7e4cb9ecf9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEN962300830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a926ad4d58fb3c6c11f1107d558a68ab9333c1d610c9e99f202b2eac7d17cfe. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEN962303393.