Mark A. Magnuson is an American biologist, currently the senior associate dean for research and the Louise B. McGavock Professor of Molecular Physiology and Biophysics, Medicine, and Cell and Developm
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 0xf0ff7a64b3c14c00564a68c711423f62766c7767bbdec63fa3853f8014cdb200. 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/411da7b0-5218-446b-8914-616d8bc7228d.json and https://artists.proofprofile.net/proofs/artist/411da7b0-5218-446b-8914-616d8bc7228d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x9489bf4bd3fffe8c19c0738d8f6e967570b6ee09dd8539805edb14508f3d0c38. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USHM20522310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d9ec6a5ddbac6c85fe2a40145572032e1685915dfaf4fb0680dbd813d050a5. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/USHM20522313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a897f18a76ce01bdec8c95383d56c81bdb8ebd9d30a6ae1973e501c45b786d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM20522314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582aa6706d80c457149abc02b6cf7fe942916298ac49f7269b5f64ba41d2c121. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:06:07Z), 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/USHM20522316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa743cd257c56a581e398988794f176c7336644ec3b01221b27b1e8eea910dc4c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM20522318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28afaa8e9fda178771810b684bcb6bf21f94c72a1c85a4e1b026a3adada02738. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/USHM20522320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d29aaf7fe4a8183bbe98cc33bd38fcb1115ac52a8ceb7084ecbe991164016bc. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USCGJ0663780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a1b2e68559a67794e0f118f909e75a662a2a2d9120fccbea2b65c7c8c5b3f9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCGJ0663782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357bb77dbd4b3d5cff54edbe0b354c4279b2bead6e2f161f692e5b23845db77f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCGJ0663787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0565af4f422aa83b4b0ccc2d80a5ce1adf12a7d0ed64492ea714436a15e1467b. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USCGH1164930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9603bccb9d60ea4f3ff781d29227f3c35a74e99db28784662a9f2ba9bdd48f19. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USCGH1164932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bf7aeae1d670537df474a812940cc474bd315ac51bbb6701f2dc2d92ad625d. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/USCGH1164933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafe0bace1b880b5884619dacaa2fe66ccb6685d581c1d2d5e65e3bab0574c1e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:21:03Z), 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/USCGH1164934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b0621a33100ff0309400e308cd89713c6c25039399006eb13bf32883d2f893. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:13:52Z), 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/USCGH1164935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86670ba2c82d43fe582de41f62a36bb67fa607852327688fa13cf5533eedd173. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:39:30Z), 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/USCGH1164936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd47988c2879d28f9b63a4271075a5c6cc5aa72f6b4a21b311e35fbe434ff949. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGH1164937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870e28c29916dfce6224bb592ad42105d6dd00a0f3366295349ebab9699e873b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGH1164938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3c26d440636eb7edb8ffc9949daad5f291bd71ba98f112844e76b614244e92. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USCGH1164940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab90390292bedebaa1f63c04f029abe2f6f38f75ae03e95c1acda3704517b90. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USCGH1164942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c34424449ceed98123dd2d3fe381ddf0ebc10693939d56e9d42baa891787f5. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:57:30Z), 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/USCGH1164943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26f78792d4e2e80454a2b59cb00bff207a9cddd9e997e3a4a7ca3d224ad6135. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USCGH1164944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0063762e78ac2a2e056b5a25ec17729f3d66082d12408190d1097a76a27d6d45. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:05:47Z), 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/USCGH1164945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea407778bcb09bb60ce9b3c2af0ee675d0e30ac3a3f12072cb22e57683741bfe. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCGH1164946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4f83932d6b21931607fd871689409d4df9180de1b3c0ed2b420ebb6ca3fea2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM91134406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9b5977b61729eb17c946df52133cebecdd81f5da5707b9ec00b8a5cca47be6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCADA1734968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80756688cafd3b6ae6e6df7bac9760a1b443ee5efa2c23167b0945309b5dddcd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCADA1734969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36b6dcd0e484cde6f9f5ad676092a63958c9f34ac3214552d8587d54c227bda. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:49:04Z), 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/TCADA1734973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3a911729b6dd98137bb68abcb2a2a57462f0b802aacc82d3438b5e4ffda268. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCADA1734977.
Easter Morning (Instrumental Music Acoustic Guitar)
On a Hill Far Away (The Old Rugged Cross)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c826946457b63322a8e58ab01e383e035edd4c3c19dca177f1a6de203339cb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCADA1734894.
Easter Songs - Instrumental Acoustic Guitar
Easter Hymn Favorites (Instrumental Acoustic Guitar)
Shoebox Melodies (Instrumental Acoustic Guitar)