Leroy Robertson (December 21, 1896 – July 25, 1971) was an American composer and music educator. Robertson was born in Fountain Green, Utah. One of his earliest instructors was Anthony C. Lund.Bergh
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 0xf82e49331dba4bfdd8a57cd41f9b751f0b36fbc5471af18bc4764e0133370d8c. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c40ae26-acd8-4883-a740-75c084e93d58.json and https://artists.proofprofile.net/proofs/artist/0c40ae26-acd8-4883-a740-75c084e93d58.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Leroy Robertson: A Treasury of Chamber Music
Come, Come Ye Saints (Arr. L.J. Robertson for Choir & Orchestra)
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 0x096dc4a77130e2f8eada4016b9cfcd2675929910ac30a8660bf292de95cc0a2c. 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/USRUF1010397.
Crucifixion: Upon the Cross of Calvary (Arr. for Solo Violin & Strings by Kurt Bestor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbb70d89c781d085a555cebeced71802777c8c08e40c6bbd677a7aa367ed988. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/US23M2200177.
Battle Hymn of The Republic: Very Best of the Mormon Tabernacle Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddbc2b88776733dfc2eb66eddf117aba828343d784a690c6c8b40685ed02acf. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USX761695419.
How Beautiful Upon the Mountain - 2025 Remastered
Eugene Ormandy - Highlights from The Columbia Stereo Collection 1964-1983
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dbb8f6d72f4805a0ce127d42378c440cef1492cab1dab6c8dc470d920b4a04. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USSM12402170.