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 0x532c04fe4d5ed78ab56f9bc8967fc4547d9863ef4a3dfb477ff1ccb4863d9da1. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b17c68b0-2f35-4003-a6e8-2f8c5689a2b5.json and https://artists.proofprofile.net/proofs/artist/b17c68b0-2f35-4003-a6e8-2f8c5689a2b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Happy Xmas (War Is Over) [Tuba Quintet Cover]
Happy Birthday (French Horn & Tuba Multitracks)
Peaceful Time Before Christmas (Arr. for Tuba & Euphonium)
Hello (Tuba solo with French Horn accompaniment)
Marching Tuba - Vol. 1 John Philip Sousa
Golden Marches of the Salvation Army, Played on Low Brass (Baritone Horn, Euphonium & Tuba Multi-Tracks)
Marching Tuba, Vol. 2 - International Marches
Classical Favourites, Vol. 1 (For French Horn, Euphonium and Tuba)
Peaceful Time Before Christmas II - Christmas Music for Tuba Quartet
Happy New Year (For French Horn and Tuba)
Pictures at an Exhibition - Modest Mussorgski - Low Brass Version
March: Spirit of the Army (Euphonium, Cimbasso & Tuba Multi-Track)
The Powerful Tuba - Five Fanfares for Tuba Quartet
Deep Harmony (Euphonium & Tuba Ensemble)
Deep Harmony - Euphonium & Tuba Ensemble
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 0xeea977ff3e7404aa7d443c61408299b20130720aa0192a0356df711e4b6c17c7. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/NLHR52139944.
March: Down the Street (Euphonium, Cimbasso, Tuba & Glockenspiel Multi-Track)
Tuba Covers, Vol. 1 - Movie Heroes (Low Brass Multi-Tracks)
Octubafest Party - Tubaquartet Music for Octoberfest - Oktoberfest Party
Peaceful Time Before Christmas III - Christmas Music for Tuba Quartet
The Rocking Tuba - Rock Music for Tubas and Drums
The Symphonic Pianoman - A Tuba Quartet Tribute to Billy Joel
Around the World - Euphonium, Horn and Tuba Music
Peaceful Time Before Christmas IV - Christmas Music for Tuba Quartet
Christmas Marches of the Salvation Army (Low Brass Covers)
Sgt. Pepper's Tuba Band - a Tuba Tribute to the Beatles - Beatles Music for Tuba and Euphonium Quartet
March: This Is the Day - Euphonium, Cimbasso & Tuba Cover
March: This Is the Day (Euphonium, Cimbasso & Tuba Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130cd564105c6e7d80422d99920bf8414d15d8136677e1edd9d78d044f80c984. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NLHR52161757.
A.R.C. Centennial March - Baritone Horn, Euphonium, Cimbasso & Tuba Multi-Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdeb89b579184fd0aa544d550d6d6a9d4b064872fecd831acf53ec8f14fa89e0. 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/NLHR52153005.
Collection of Children's Songs, Mov. V, Jezus Houdt van Alle Kind'ren / We'll Shout Hallelujah - Baritone Horn, Euphonium & Tuba Multi-Track
Tuba Players at Sunday School (Baritone Horn, Euphonium, Cimbasso & Tuba Multi-Tracks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cce5222388d84bb38d2160f8c9f02e898354bd572f7c2405dca1ae8b3f45d9. 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/NLHR52106198.
March: Kensington - Euphonium & Tuba Multi-Track
Marches of the Salvation Army, Played on Low Brass, Vol. 2 (Baritone Horn, Euphonium & Tuba Multi-Tracks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d2a0e6e4c3adad68f390a31b08397164ed922c6af6803704716c40d1a1de42. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NLHR52122061.
God's Soldier - Baritone Horn, Euphonium & Tuba Multi-track
Songs by Gowans & Larsson Vol. II (Baritone Horm, Euphonium & Tuba Multi-Tracks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd9028a45ab105c6a8c05989f2fb9907b921f9a8acfb3c90fc1a2dcada80bb5. 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/NLHR52121045.
When The Glory Gets Into Your Soul - Euphonium & Tuba Multi-Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0a677ce7962f436c6c3709a5b169a11c65853b917edfa58a588bf07009cc8c. 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/NLHR52121046.