Morten Johannes Lauridsen III (born February 27, 1943) is an American composer and teacher. A National Medal of Arts recipient (2007), he was composer-in-residence of the Los Angeles Master Chorale fr
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 0xe34ca04b71abe73a874514f1cb385af18fce4d8678f90f049b38c2a58d940dc9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef1415c4-08aa-4f95-a8a2-4115a6c0bc62.json and https://artists.proofprofile.net/proofs/artist/ef1415c4-08aa-4f95-a8a2-4115a6c0bc62.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 0x414ff31633622229698f40df7169ce2bd79ef09f073d6d2c674a0961c368c554. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBF071302800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7941c5dda6c9aa34164b23489427dbbe0ebe361a0570e7b407ac6863cc50970. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF071302830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02559c25af2ac48ed17439ebda04108610afa541cd7e7236429b4663530f642a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBF071302840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94198d22b9914438817686c7bc0bdce0331bf473ebf5e0a83a29f182dad83127. 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/GBF071302820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b86c0171dd68aa44196ebd9eb6e3f7e4ce59237b2ab9ffc98166743cb0b1da. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBF071302810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e20c154279a3aaf287924eb0d6d37cae4ad805ef0114e227e78b303cc9ff7e2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBF071302910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8e0b9c98d3e65d40d23a5fd32ca88f4c46bec6d40dfb8a1c5cc27d6efbb194. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF071302870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568802aa905fd3c293ad4dfac00e377beaf15d48b7f47178ada2422bb1f85c4b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBF071302880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34af8f5c2d80233c8c9289b1df086c7f030aa0f139cce59a18733554585dbfe. 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/GBF071302890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f4fe5a4ab5099dc0969759510cfff6a44d4bdb551c2eeb0e8e4ee73d46aff9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBF071302860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f171ce0041fbe7fb8043b95277870cff380b3b40300504a892f77970cc07c85. 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/GBF071302850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dd035d1b8c724cd04077cbba4d419c58984e663d0081b458d8abfb24362fc8. 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/GBF071302920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3ed21b00ddf106fd48f309458f32fd87832b845d1b71953aad49eb6cad71f5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBF071302930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33d031673677613981c8f0b6e543da34ee4f36ade2e094489572133180fb06d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBF071302900.
Te Lucis Ante Terminum, Pentecostal Tone
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf768be429164e4fa81ee9feb2dc4c19fa53e9c930b39a6de4a3e1c10f81dce8f. 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/GBF071302950.
A Company of Voices: Conspirare in Concert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacaeb7b6b14ba8b90ce579611374174e6483357fa47d26a6aadef3ee186b6af. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM10853401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13099081af07b51784fa3102521925843526b5a50d66bf424effbabb1c926b64. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF071403940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab495dc534f103a7566dd810926b00f2c32c19f6390d23614a3c3f354b7c2679. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM10853411.
So You Think You Don't Like Classical Music? Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01efd60c32d85ebe5b5aee465f167a3e53c228e7c2ba2545672b04f6adc71a8. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GBUM71029454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf203c6248565e725ad4586bf89fb3310bd326d3e6fb053e64bcb83c54a0e8b62. 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/DED811769200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309b28ea8817d50ca75ed0f1e9f7d76cf3cce697b4a45d01e27da79181b73df2. 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/GBLLH1126202.
Agnus Dei (from Lux Aeterna) [feat. Donald Funk]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a601f1dcff43565435b29d9e59023c8a043feb3bef512181bb7fe07bb201a3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USAKS1200083.
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 0xd41fef6fce602f3e84fbd85529912afd8b5d1455efa7f7977594b55b2eb93db7. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/US9930513256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2176a9e537b3639f32fad6f27e69e9707309c7797f7181309e98964d96bedbd5. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DED811769100.