1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xa0d15ee82fc6f1448b3d9dd9af72a65c797ef3174260cd43f98a6a972985f86f. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1a3bf22-7fe9-4c80-8fa7-dc296856abba.json and https://artists.proofprofile.net/proofs/artist/b1a3bf22-7fe9-4c80-8fa7-dc296856abba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vom Himmel hoch: Vom Himmel hoch, da komm ich her
Christmas Oratorio, BWV 248, Part I: Jauchzet, frohlocket, auf, preiset die Tage
St. Matthew Passion, BWV 244, Part I: Kommt, ihr Tochter, helft mir klagen
Zadok the Priest, HWV 258: III. God save the King
St. Luke Passion, Pt. 1: Part I: O Crux ave (Hymn 'Vexilla Regis prodeunt')
St. Luke Passion, Pt. 2: Part II: In pulverem mortis … / In te, Domine, speravi (Psalm 30)
Gloria in D Major, RV 589: Gloria in excelsis Deo
Symphony No. 8 in E-Flat Major, "Symphony of a Thousand": Part II. Final Scene from Faust: Alles Vergangliche ist nur ein Gleichnis
Cardinal Stefan Wyszynski University Choir
Magnificat in D Major, BWV 243: Magnificat anima mea
Te Deum, WAB 45: Te Deum laudamus - Te ergo quaesumus
Grande messe des morts, Op. 5, "Requiem": Agnus Dei
Chetham's School of Music Symphonic Brass Ensemble
4 Choral songs, Op. 53: No. 1. There is Sweet Music
The Choir of St. Mary's Episcopal Cathedral
All-night Vigil, Op. 37, "Vespers": Hail, O Virgin Mother (Ave Maria)
Symphony of Psalms: I. Exaudi orationem meam, Domine (Psalm 39, 12-13)
Requiem in D Minor, K. 626: Introit: Requiem aeternam
Requiem in D Minor, K. 626: Sequence: I. Dies irae
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 → block OTSBitcoinBlock must exist at that height 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 0xb4978068ce233771d3c9434f04051a0d488af637730e291272d5b1ea99234838. 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/USB8U1602112.
Missa Papae Marcelli: Masses, Book 2: Missa Papae Marcelli: Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678e3a53a33f3982a7fa3ea27cf4b3b50ef9c615404808b36f849911e39e5756. 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/USB8U1602138.
Fantasia in C Minor, Op. 80, "Choral Fantasy"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179be90e9193bbf7a048147ea3ede8bab1a5751795decf64ef5e1c0cebb9631d. 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/USB8U1602114.
Ein deutsches Requiem (A German Requiem), Op. 45: I. Selig sind, die da Leid tragen
Munich University of Music Chamber Choir
Messa da Requiem: Dies irae: Dies irae, dies illa
Berliner Messe (1997 Revised Version): Kyrie
Berliner Messe (1997 Revised Version): Gloria
Mass in B Minor, BWV 232: Kyrie: Kyrie eleison
Berliner Messe (1997 Revised Version): Agnus Dei
Mass in B Minor, BWV 232: Agnus Dei: Dona nobis pacem
Elias, Op. 70, MWV A 25, Pt. 2: Elijah, Op. 70, Part II: Alsdann wird euer Licht hervorbrechen
Vespro della Beata Vergine, "1610 Vespers": Domine ad adiuvandum
The English Cornett and Sackbut Ensemble
Die Schopfung (The Creation), Hob.XXI:2, Part I: Stimmt an die Saiten (Awake the harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d6dd3fc6abe42fb5e8beafc236fe4987cd837ed22afeec954f0b04c014f082. 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/USB8U1602121.
Choir of Gonville & Caius College, Cambridge
When This Cruel War Is Over (Arr. for Voice & Choir by Matthew Guard)
Figure humaine, FP 120: No. 1, De tous les printemps du monde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2203afc29c725b1f45799c16341146a45f44d54ed149ca748ae58ae30481b8f2. 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/USKC62427803.
Figure humaine, FP 120: No. 2, En chantant les servantes s'élancent
Break It Gently to My Mother (Arr. for Voice & Choir by Matthew Guard)
Figure humaine, FP 120: No. 3, Aussi bas que le silence
Johnny, I Hardly Knew Ye (Arr. for Choir by Alice Parker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e68cef1762214f1e1cf142f6b64f25a9b64c7f6db99b01ace82207f5079302. 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/USKC62427807.
Figure humaine, FP 120: No. 4, Toi ma patiente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bd06406ccd216d009d676e215ef971f26736caa6bf6f321c4637617560e229. 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/USKC62427808.
Soldier's Memorial Day (Arr. for Choir by Matthew Guard)
Figure humaine, FP 120: No. 5, Riant du ciel et des planètes
Workin' for the Dawn of Peace (Arr. for Choir by Ron Jeffers)
Figure humaine, FP 120: No. 6, Le jour m'étonne et la nuit me fait peur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5cc97fe8718448b4b6b49e4836f029dd446cba5e7ad5135122efcdb4cb6458. 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/USKC62427812.
Abide with Me (Arr. for Voice & Choir by Matthew Guard)
Figure humaine, FP 120: No. 7, La menace sous le ciel rouge
The Battle Hymn of the Republic (Arr. for Choir by Matthew Guard)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1eabbb8b3dad69961229a664465e5faa55d546333c336545740c2282740ea6. 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/USKC62427816.
Wondrous Love (Arr. A. Parker & R. Shaw for Choir)