Anton Eugene Armstrong (born April 26, 1956) is the conductor of the St. Olaf Choir as well as the Harry R. and Thora H. Tosdal Professor of Music at St. Olaf College of Northfield, Minnesota, in the
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 0x3d6ff63c7c19a49e822b92cf488db414f02385bfb6945d889c6a1937e3592d66. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c7681f1-d826-400e-9350-b2fc22047521.json and https://artists.proofprofile.net/proofs/artist/2c7681f1-d826-400e-9350-b2fc22047521.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Climb to the Top of the Highest Mountain (Version for Mixed Choirs & Organ) [Live]
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 0xc6cde12a01fa32bb786de867510c6ab638739b8d59a475244b9f328863d66c0c. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/USB8U2005612.
The Word Was God (Version for Mixed Choir) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbbc50169c7253bba9addd109ebf02b9631c24e1f3d1af32575971f12ecc6e9. 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/USB8U2005617.
Cradle Hymn (Version for Treble Choir, Strings & Piano) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad6c5afb6655a237c6624d118ab24dd77b0f9bf27da9f5e5899b576ffac0ede. 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/USB8U2005618.
Even When He Is Silent (Version for Mixed Choir) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadb857a9051e5fdfa346669e510a957e3afd2539fc865e2d76425ee8a4f4cb8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USB8U2005620.
Night of Silence (After F. Gruber) [Arr. J. Ferguson for Mixed Choir, Piano & Organ] [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545b667bc2e4897d4f76edda2697e9e96037d51b538c326183fa76c2d02282ff. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USB8U2005621.
Holy God, We Praise Thy Name (Arr. J. Ferguson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2594ebd6a3cbc47cac7d99c3e97da805d0f064ae1b435cf87620c839135cd072. 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/USHM81065563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dc46fb34586334e80494bf198c08d464068ae7e3172d05294d5744e9011254. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USHM81065564.
Praise to the Lord (Arr. F.M. Christiansen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae8ba6c1a66555f41f94d49a26741288b3fbd5192c5e219c7e4eec4207d8661. 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/USHM81065565.
Rise Up, O Men of God (Arr. K. Jennings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25da8b13de9fb24f3d86800981073d55f9d8ae0231f50cb76982792feac626f. 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/USHM81065566.
A Mighty Fortress Is Our God (Arr. J. Ferguson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf49de07e88e8852375e613cc99587428a9db3b3628db53ce4bef869bb39e66f. 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/USHM81065567.
Children of the Heavenly Father (Arr. R. Scholz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6384bd29ee74cbb999ed5846afef949a9ac5eba8a97185ac5614b1aaf144216a. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USHM81065568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3d5e1c2deddadd24d9804626c83763a9894ca628b5d28b5ae8d68654b4f246. 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/USHM81065569.
From Heaven Above (Arr. E. Pepping & J. Ferguson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8285547692cb1967ba814081e5e9743b728189cc245acf83f439a092079edb1a. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USHM81065570.
O Day Full of Grace (Arr. F.M. Christiansen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf051e65ef4bcbb15a1e63bedd6ab4f87d1a82ef4e161b7b449a9869a89d1ed97. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USHM81065571.
Thy Little Ones, Dear Lord (Arr. K. Jennings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe337d3f7594a8f0c923b49aa098de482caba786c0cb153d7464b0547495ddb8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM81065572.
Beautiful Savior (Arr. F.M. Christiansen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8568376f1f2382701e18a9dffd99c1537953b7409f8aa9ddb95ef1dcf78b4608. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USHM81065573.
Blessed Assurance (Arr. for Choir, Piano & Percussion)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db2c8fa5cf4d7dcb577abb363f77743f44d74afcc435298ec6410554babe58a. 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/USHM81065574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c9c3a9dcbf9979d222ba92c181b1612f9ea825b3d9e427339383db56ded511. 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/USHM81065575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d968825cc3bc69bd98a658aeedb5f08d9f5b0cc3477015b58d20294eb6bfac3. 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/USHM81065576.
When I Survey the Wondrous Cross (Arr. G. Martin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a2e26835a0b624950c148b37cb1f2654520a503e4309d72443f1cd062b009e. 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/USHM81065577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee219535b6a3fe6d42cfb35866e99e44992adb3813282224a42f41d6f50067eb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM81065579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92783e564e250cfcea9e1e4885762f1235c13f21411d711b91f3fb64b819002e. 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/USHM81065580.
Love Divine, All Loves Excelling (Arr. J. Ferguson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1ad99a9266de6a32db5b774c0e51b858623a99d897ec26254c3c8a9f26d3aa. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USHM81065581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d1f683cc032e19813a87fde79890f4a9e6a03b7cef1239d03a237530aed2e3. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZPRL2100506.