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 0x42411032cf87ba7ad312829fd2224c4942fddb132200e384ccba49099aa01619. 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/29afc515-88b1-41b6-9a3c-16469e4fb52f.json and https://artists.proofprofile.net/proofs/artist/29afc515-88b1-41b6-9a3c-16469e4fb52f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Boccherini: La musica notturna delle strade di Madrid
String Quintet No. 60 in C Major, Op. 30 No. 6, G. 324 "La musica notturna delle strade di Madrid": I. Il campane quando suonano l'Ave Maria
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 0x225fb39344a1d895c9b8bd32278e12e452d1bae06d4e311e8682df2d5aec765c. 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/FRZ141020010.
String Quintet No. 60 in C Major, Op. 30 No. 6, G. 324 "La musica notturna delle strade di Madrid": IV. Il rosario: Largo assai - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093b75cd97156c694ee10c11ee9989146bf628bb205bcc96e6e248580b2ffff2. 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/FRZ141020020.
String Quintet No. 60 in C Major, Op. 30 No. 6, G. 324 "La musica notturna delle strade di Madrid": V. "Los manolos" Modo di suono, e canto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e8f6fa31fdb5d077e7be5627824233dc69478ac1ca97ca812d7891f2321092. 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/FRZ141020030.
String Quintet No. 60 in C Major, Op. 30 No. 6, G. 324 "La musica notturna delle strade di Madrid": VII. Ritirata - Maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96f6c352d3d728ca8c963feada5dd577cc5f0d6c0efac12a4f7495786c4c7ed. 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/FRZ141020040.
String Quintet in E Major, Op. 11 No. 5, G. 275: I. Amoroso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb634ee479ba48f42151ff0b6f0ab1c7f93f55b6b26ca937cb0f03526b9495c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRZ141020050.
String Quintet in E Major, Op. 11 No. 5, G. 275: II. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc619219b0287aed48d9493af68bfc2caaac36be939c91c5eb193567ffc0499. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRZ141020060.
String Quintet in E Major, Op. 11 No. 5, G. 275: III. Minuetto - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006da42629dbae6234416866c242865f4783aa502debf83f3d1cef7cc8112764. 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/FRZ141020070.
String Quintet in E Major, Op. 11 No. 5, G. 275: IV. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c50245a31022c8427fc845163c6982bc71f43b1af4a11d03100d7e310cf6b1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRZ141020080.
String Quartet in G Minor, Op. 32 No.5, G. 205: IV. Allegro giusto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1850eb03a4f72655caf77484a1f861c958cf1ac6d58a398894e02359a97e477b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRZ141020120.
Guitar Quintet No. 6 in D Major, G. 448: III. Grave assai - IV. Fandango (Arr. from 1st & 2nd mvts of String Quintet in D Major Op. 40 No. 2, G. 341
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d2e757420a1026d42b0f352bed4889fbbaeb99f6a4d048420360206b108f36. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRZ141020150.
Schubert: String Quintet & String Quartet "Death and the Maiden"
Cello Arrangements - Piazzolla, A. / Villoldo, A.G. / Gardel, C. / Salgan, H. / Gade, J.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b040dd1b0bfa2871f316c66ec0007ff6643bc37479128c9dc98f6fbbf0ddc27. 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/DET900812602.
Douze Hommages à Paul Sacher pour Violoncelle (David Geringas und seine Cello-Klasse der Musikhochschule Lübeck)
Italian Postcards: Wolf – Mozart – Borenstein – Tchaikovsky
Babylon Berlin (Original Television Soundtrack, Vol. II)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c03d8aeacb66ee32b17af8239604eb7ad5617295c1648654da445fb84d772e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:18:26Z), 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/DELV41900773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a1290b5b5c507c47f157e8a4fc7172a42b0eecfc213481444100494131f4fa. 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/DELV41900775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd98e4b8410f514ae1b45ad15caacf5147326d84f2d362178d62e7b2ba72996. 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/DELV41900777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a04887a2677ad13ba1f1880d0cce5ca460f3d174adca68b921d386939cbf294. 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/DELV41900778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808b10534672017cc2533106a845818719b433929b3ec742787d155deedd7777. 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/DEU240528232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad024041a983d0b661df9cc8e2f6a5041081101c6936e6ce0e43e6aba8036ce. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:03:08Z), 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/DELV41900782.
Elsa Mechanik (feat. Meret Becker und Sabin Tambrea)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cd58385dcf1d4aa24a8644f1d032f2d7b2b03de1c9100e3ae148b5b489e901. 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/DELV41900783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ebc1d4eba8a2976de8ea3750c378bceca49878709b82ab70a20b2c38719540. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DELV41900786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716f94a6f5fcb7b3dbf79cb6d38968daefd9e98270931b1a1fec1cd76a00ab1e. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DELV41900788.
Du bist alles (feat. Tobias Morgenstern) (Filmfassung)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730fe679fe16315672638c9dadba1051129b5cef123b52266cb4c3ad8f0f6f67. 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/DELV41900814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ebc8b214e274b709e331c247623f28a333fa42dc2b152ae5670d6ef8348c81. 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/DELV41900791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa578d5de19af9bedc570d9972214c143139e4959a133db005064b7f5b848f3c. 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/DELV41900789.
Piazzolla: Concierto del Ángel: I. Introducción al Ángel (Arr. Runge & Ammon for String Quartet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b213849419c535cc694c148d5abaa2885b1aad1c2530ab0f15192f45ff6e5ed. 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/GBAYC0802761.
Dvořák, Beethoven, Shostakovich, Piazzolla...
Allein Reprise (feat. Eckart Runge & Jacques Ammon)
String Quintet No. 60 in C Major, G. 324 "La musica notturna delle strade di Madrid": V. "Los manolos" Modo di suono, e canto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e8f6fa31fdb5d077e7be5627824233dc69478ac1ca97ca812d7891f2321092. 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/FRZ141020030.
String Quintet in E Major, G. 275: III. Minuetto - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006da42629dbae6234416866c242865f4783aa502debf83f3d1cef7cc8112764. 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/FRZ141020070.
String Quintet No. 60 in C Major, G. 324 "La musica notturna delle strade di Madrid": I. Il campane quando suonano l'Ave Maria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225fb39344a1d895c9b8bd32278e12e452d1bae06d4e311e8682df2d5aec765c. 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/FRZ141020010.
String Quintet No. 60 in C Major, G. 324 "La musica notturna delle strade di Madrid": VII. Ritirata - Maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96f6c352d3d728ca8c963feada5dd577cc5f0d6c0efac12a4f7495786c4c7ed. 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/FRZ141020040.
String Quintet No. 60 in C Major, G. 324 "La musica notturna delle strade di Madrid": IV. Il rosario: Largo assai - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093b75cd97156c694ee10c11ee9989146bf628bb205bcc96e6e248580b2ffff2. 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/FRZ141020020.
String Quintet in E Major, G. 275: I. Amoroso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb634ee479ba48f42151ff0b6f0ab1c7f93f55b6b26ca937cb0f03526b9495c. 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/FRZ141020050.
String Quintet in E Major, G. 275: II. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc619219b0287aed48d9493af68bfc2caaac36be939c91c5eb193567ffc0499. 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/FRZ141020060.
String Quintet in E Major, G. 275: IV. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c50245a31022c8427fc845163c6982bc71f43b1af4a11d03100d7e310cf6b1. 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/FRZ141020080.