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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aab033bac5df56a4953f6d124750ec90ebd66f50e83260fd98f1eac020883b0. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f5e26f8-1694-4f76-9814-c31f43c02585.json and https://artists.proofprofile.net/proofs/artist/8f5e26f8-1694-4f76-9814-c31f43c02585.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Variations On: Long, Long Ago (Euphonium Solo with Piano Accompaniment)
Going Home From: Symphony No. 9, "From the New World" (Euphonium Ensemble with Piano Accompaniment)
4 Valves & 88 Keys (Works for Euphonium and Piano)
The Reason - Euphonium Solo with Piano Accompaniment
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d3f1021080d43f062047a2a1f75d03d92e370b9ef2b82ae10f586f37234355. 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/NLHR52131025.
Going Home From: Symphony No. 9, "From the New World" - Euphonium Ensemble with Piano Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97f1a39cc2049bdbf309d73f24088f586722547cf3d632387a7ba1df90123f2. 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/NLHR52130739.
Someone Cares - Euphonium Solo with Piano Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8312f30c974034815d06432f3ad7fc3d000fd6bb16018a99f870d5873e111d8e. 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/NLHR52131028.
Londonderry Air - Baritone Horn Solo with Piano Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529af0dd0a5f8f4c75fa331d8225c789b5c48a1bef20d535e932235ff0a734e8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLHR52131027.
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
Prayer of Childhood - Euphonium Solo with Piano Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27c55362f4d2b0bf43631991eb73d4801948f0b5b14a3584c2d860e97655510. 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/NLHR52128841.
A Christmas Wish, Vol. 1 (Christmas Carols tunes Tunes for Euphonium & Piano)
Come, O Come Emmanuel - Euphonium Solo with Piano Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a53f38d1b65a3f2f43a52e0f17b9642c7b3591dab8f8f04123aa7224cbff8b2. 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/NLHR52134567.
Go Tell It on the Mountain - Euphonium Trio with Piano Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86422cff83a6ff9161ba43cb9f005fd614fcdf409251aa02c081900fd80f393c. 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/NLHR52134571.
Still, Still, Still - Euphonium Quartet with Piano Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff49f1349b62797b509e393226b1a0ff07fc7d6cc7789ac3efebb89fa6883fb5. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NLHR52134566.
Land of My Father (Euphonium Solo with Piano Accompaniment)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbadd9668cbb0605f9840c28be5c8aaa4092ebb4964fd1469d6a14853393867. 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/NLHR52153119.
Missa Brevis (Vocal works for choir, string quartet, brass quintet, flute and piano - Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9555f8cef1442d8deb9811775fedb0fb34b1607b3de3c614f6cf738cc6418f4. 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/NLHR52152039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746c604650743154070272b446df3c0c359cb1790822a3d1361e83e2fa2646dd. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/NLHR52153007.