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 0x0ff6f0e397a68f4cd435e4d39861ed90ede6c30de32466f06bde6b9e92a48d28. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efc39524-508f-4967-83ee-996790d50239.json and https://artists.proofprofile.net/proofs/artist/efc39524-508f-4967-83ee-996790d50239.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 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 0x845a9f2f982c6d92fe705fcbe0e8318567451bb3fb6c62a146d0b7a6861617e3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZ27R2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97dddd7a4438a0098201da2ab7e08016f92dd4d69ac585ec28d620cc28685bb. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QZ27R2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaba5d650dffe0e85280a73264929d7c2b28e5634a5285d6c48c1161f7573959. 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/QZ27R2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c9cffbad3eb7cdd4f44ee43b8723b9c0110e6fc6190c6dc1813ccfd221cfed. 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/QZ27R2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acd74a83c4f902e42b857e104a5eb7c3499146c166fd312ace6f3838e64b4ae. 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/QZ27R2400003.
Reflections: I. Resumen de Otoño by Julio Cortazar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ffde9ad46a718858796fbf3e145b5da97de837c8c03eb321919e34288e4e80. 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/QZ27R2400004.
Reflections: II. El Atardecer by Pablo Neruda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde9d2b2078d6bca37ef39143072b2e30a2f2c88050686b295523cc39cb7ac19. 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/QZ27R2400005.
Reflections: III. Una Carta de Amor by Julio Cortazar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b686b0dd279393ba2a27dceb2faf94897f0c65b2c0dc49a8c4658ebf94ed99. 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/QZ27R2400006.
Reflections: IV. Con La Primavera by Jose Martí
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdea444395557f2dd37b95879ea1c0e3d50cee42c0d7e03a2d0c527aa97d3029. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/QZ27R2400007.
Reflections: V. Un Breve Amor by Julio Cortazar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae194e798659ed9901f004d6cd5d478b416084d3dc69b6691fffca468aa1c821. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZ27R2400008.
Chen Yi: Ba Yin (Version for Saxophone Quartet & Wind Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d69d7e466f1d4c3fdcf3fc857c9a226b97011d181a921b3a3a557f83d05b56. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZ27R1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca69fcc69e19cc418ad41fb12b0f4d84910e77f23553e8aadca5288bc181718. 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/QZ27R1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea20e2120824a4b3b24594f7fc1e308f6428f21a516737d2670f99e16a91519. 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/US29K1077802.
The Fifth Century: We See the Heavens with Our Eyes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b0056667a362c879f0fc4571d6b5d3647f86fe32783ac7b41c255f2aaa76cc. 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/DEB331440501.
The Fifth Century: As Sure as There Is a Space Infinite
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d45d63d0b0aa94957b52607af194347e6fbc5f319039ea8533b46e9057277d8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEB331440502.
The Fifth Century: Infinity of Space Is Like a Painter's Table
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31e37ac4bd19dafbd27abcfea40ab107266c2b49d8767dff1010d7e4f854791. 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/DEB331440503.
The Fifth Century: Eternity Is a Mysterious Absence of Times and Ages
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e241f1b0221a543c2216c88d5a68dc8762eca9bdc6f1d1baa536c58a633f66e. 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/DEB331440504.
The Fifth Century: Eternity Magnifies Our Joys Exceedingly
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912b4f9ce739ace58a98b6ae3199757c14272d1fad29271e1c0f991976ebc0c1. 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/DEB331440505.
The Fifth Century: His Omnipresence Is Our Field of Joys
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224a9d837db0718925653bd4f24e76e65688655cf201e9dc7f2833e50fceb656. 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/DEB331440506.
The Fifth Century: Our Bridegroom and Our King Being Everywhere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484baba7d4386f13d383b03a70175047bf59985036e1742c3d34b2ded05ecdd5. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEB331440507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88dd6c16e2460d701d7e69b8510cd6f17eceed3bc1119beff5f499616bbc90f. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEB331440509.
Bolcom, W.: Concerto Grosso / MACKEY, S.: Animal, Vegetable, Mineral
Bolcom & Mackey: Concertos for Saxophone Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d0038871e1f065b0269609996ddfc9af3282c40be26779fb7adc6b83499c55. 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/US29K1076701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712f77dc556629679e342bae7b79886d0f9d54f92719ef1802c4ee01fb03bcb7. 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/US29K1076709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3e8a531ff42ae10873c1d71935855195e5dcc0c7262e33aa602492dcdc8c1a. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZ27R2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e45e6f46a09c48423353566050cca2f7328d1edd12da0ff26300d5d9679660. 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/QZ27R2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a131e94e6b44e589d50e4fd2043294b0556a0aa6b98e097f27431883651e5c4. 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/US29K0869302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b123dea811a969111e39072e4e6ce8149c4701640b9863fcdb23a4b70a1a1a8. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/US29K0869305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f878710eebdf604aac4e01923831fabf418f7f0057416dec19002436d0a8470. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US29K0768702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ea54242f6358346814a5a2d24649fef90d12f6ca2f85cae0c5330a91d6972d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZ27R2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6377971236d1e61382e05c804bad15d3714a93e196395396f8f54e39a7ae4264. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/QZ27R2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724116f7c26793e52408ccb869dd9da2a13a6d2750bad713554ace40c478a7c0. 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/QZ27R2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d4bc94de61793ff5af3d8cfe5e101f8ddc89a6c5fffe3861c266271119223e. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZ27R2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf635e01a0885351f14835b802353c3bde6896b9948d37426ce02b120d6472796. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZ27R2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcda6ff410d67b83ff4acc1c902365677c833cfacfd2a2176da076de58c5a2f1. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZ27R2500006.
Concerto Grosso for Saxophone Quartet and Band
Heritage / Evolution, Vol. 1 (feat. Steve Lehman, Dave Liebman, Rudresh Mahanthappa, Greg Osby, Tim Ries & Miguel Zenón)