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 0x8d177e77f896675f8c1d8d277b256a8f766e1bdeea60e059664669703cae3f2b. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf179d3e-0604-4bee-94d0-488f4ab2ed1f.json and https://artists.proofprofile.net/proofs/artist/cf179d3e-0604-4bee-94d0-488f4ab2ed1f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Grand Choeur Dialogué (High Brass Version)
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 0x1c2ca1627c448085134597380302c14264db94518dae5919f8d3abde4d409dcb. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZMEQ2591602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0862f53474ba8ad9cdb5ade4ef156ebf55fdf6e7e015436db937785ac5a00c. 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/QZMEP2573726.
2 Euphonic Tuba Ensembles (Euphonium & Tuba Ensembles)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc229b369c35e867e8ab3b26ffcf486a0f07c73fc7946401a300b3a97bc1f652d. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/QZK6L2511253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278d202a1e68f0cb2a2745f7da77b06fa18445f78340e6395fa9e1d781dfe723. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZHN92569532.
Quia Respexit Humilitatem (G Minor Version)
O Wondrous Beauty, Past Compare (Eb Version)
ClassiQue to Go, the Recordings for Matonizz (Low Brass, Solos, Duets & Low Brass Ensembles)
Fanfare, La Peri - Euphonium & Tuba Sextet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495773c3b77de364b5fbea3947092a33936b327134dee15d0792ff8f73842764. 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/NLHR52179730.
Funeral March of a Marionette - Euphonium Solo with Piano Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f78736e73ba805f6aab4bc9659f6095901f41e2f188e345023d14ef12d7dad. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLHR52179731.
Ave Verum Corpus - Euphonium Duet with Piano Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57a2d85a186219a743f3d349b99b14afe86f54b3d7eede42ff94222564c286b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLHR52179732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15aad13211a4e75104f9fe565ea178fcdb81f7f2bb32128131a5df2c6524f54. 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/NLHR52179733.
Air from "Water Music Suite No. 1" in F (Eb Version) - Euphonium Duet with Piano Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bd73000cdc3d5bd86641e5d3bebb58eee37905c456d7e4c86c19f42712f920. 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/NLHR52179734.
Jorijn van Hese - Letter Duet - Euphonium Duet with Piano Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09550bbae519e0a7e7708b316f128cb19aecd43643778d3bd38bdf44c244576e. 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/NLHR52179735.
Three Preludes (Euphonium Solo) [Euphonium Solo Bb Version]
Dein ist Mein Ganzes Herz (Euphonium Solo Db Version)
Jesu Joy of Man’s Desiring (Brass Quintet)
Die Bänkelsängerlieder (High Brass Sextet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad08bb5810ef2e917fafd958bba1736c78ecb991d38dd93094d0918128a6924. 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/QZFYZ2567216.
Csardas - Euphonium Solo With Brass Septet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b69f585e7fa76dbf373341129159350be1482889af77a9b1854819aafba889. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZFYZ2567213.
Cold Snowflakes At Night (Flugelhorn Solo Bb Version)
Christmas With You (Euphonium Solo C Version)
The Parade Of The Tin Soldiers (Bb Version)
March Of The Toys (Euphonium Duet G Minor Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb258cc2c6cd3599bc10c43d73ed6079de7e1d5522ec06458ef702dbd885a466b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZWFX2465274.
Funeral March Of A Marionette (C Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be806b7c5ecf10fffd4f625c5b55183b6d22c1729132da654b322ef8125bd96. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NLHR52149673.
Nessun Dorma, From: "Turandot" - Baritone Horn Solo with Piano Accompaniment
2 Beautiful Baritone Solos (Baritone Horn Solos with Piano Accompaniment)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc88758a689a51fa6751154d51e51d710e036e890fae9ce88067b1aab4afde50. 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/NLHR52158993.
Jesus Paid It All [F Version] - Baritone Horn Solo with Piano Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9469e5f2fc975ed28f0385624f303df3dd7270c65c75dca06f3f142432b2c7e. 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/NLHR52158994.
Three Powerhouse Miniatures, Movement 1. Armilustrium - Euphonium, Tuba & Timpani Version
Three Powerhouse Miniatures (Low Brass & Timpani Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db385c422920c1c8419178367d0c705b58ebbf4f914b51fb7805ede42fe6ff7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLHR52165652.
Three Powerhouse Miniatures, Movement 2. Creatures from the Deep - Euphonium, Tuba & Timpani Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9830f5a0ce82f20c2e5e44b4fe8d6ac1f08754e6f40ae6691ac9f591814c46. 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/NLHR52165653.
Three Powerhouse Miniatures, Movement 3. Big Orange Sky - Euphonium, Tuba & Timpani Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb5b8b44ba807ed563648560cd084bc8fa4bb3edc447f1d37284eed518a91a8. 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/NLHR52165654.
Grand Choeur Dialogué [From "Six Pièces d'Orgue"] - Low Brass Version: Baritone Horn, Euphonium & Tuba
Grand Choeur Dialogué [From "Six Pièces d'Orgue"] (Low Brass Version: Baritone Horn, Euphonium & Tuba)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdae764017ba946b819af9db13219fde3ebe89c5b6a02d91c0cac9023129b545. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLHR52151627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422653fda757153590099a0f68fb97e6c764e79b4c04b7864f9672f8d2c6f47a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZWFF2418628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8adf66170c47aee7619a4f601ae81309599f154b6148258642ef3d25bba0887. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZWFF2418629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd11961bc0ffe9a298ec95c3e38296afbbd246d86a2f12efa7237c8c1788e6c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZWFF2418630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8301b653de7d739b276eda1509ce6df8d1488407dd6180d1d9c9484023058e7f. 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/QZWFF2418631.