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 0x2937e59f04253375b33966fccd242729618df437ae59759df70ecb64908725e5. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/001c4f46-6b3f-4d7b-8aad-b2e85d7128ba.json and https://artists.proofprofile.net/proofs/artist/001c4f46-6b3f-4d7b-8aad-b2e85d7128ba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Centenario Roberto Espí: Conjunto Casino, Vol.13
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 0xf55c6a379a017820ea85897038fd62b34e05955724114aa74419376e6eeaa6a8. 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/NLHR52111997.
Antología: El Sabor de Cuba (Remastered)
Centenario Roberto Espí: Conjunto Casino, Vol.15
Centenario Roberto Espí: Conjunto Casino, Vol.14
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505c3439b0af7e999dd867e6fc2bd16d0d11db5fd447932ac39196574b565ed9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USV291352853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470e5ac4e8d129c8afa720fcb9d839d575f14c23ec7afaced552228d1e2fdad3. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QMDA71387113.
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
Centenario Roberto Espí: Conjunto Casino, Vol.12
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bdddef2249abe1a4819ed85e3a17748e0494f180d0bd0150ef364f659d0fa4. 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/QMFMG1395936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9f5b0d8471e483503c2e35e49b74d392a68fa627474d12e78bbf5a89a10fa0. 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/QMFMG1395942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4070f361e48da8f544b1053ee93829805841ef5f513d7ef804b4833d7deeeba0. 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/QMFMG1395931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a2b374caa28003e74775b38d8a8f340c069f861e0e42931b7c5a9d46b2bc10. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMFMG1395932.
Centenario Roberto Espí: Conjunto Casino, Vol.11
Centenario Roberto Espí: Conjunto Casino, Vol.10
Centenario Roberto Espí: Conjunto Casino, Vol.9
Centenario Roberto Espí: Conjunto Casino, Vol.8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d1fd72d8ce782312ea7522fa1efbecd7ec55e2c3827ae771e7e252dbf573ca. 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/QMFMF1336481.
Centenario Roberto Espí: Conjunto Casino (Live), Vol.7
Centenario Roberto Espí: Conjunto Casino, Vol.6
Album Centenario Roberto Espí: Conjunto Casino, Vol. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8c6382087a27a1dbab1e43f87f47fdc272db5c53820916c1008d7db15f73c9. 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/US6R21329173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5e81be38a5a3d8e5921a3e777ef62d3ad5ec1abc867977cee648accc00e513. 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/US6R21341393.
Centenario Roberto Espí: Conjunto Casino, Vol.3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e20acf21f19b81e32feea71687d69b986c4e0e5045362a8f5444241cfd36748. 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/US6R21323506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb9a468b895cda640e655372b0b0d4d9c2fa4fb0fa45fdfd61b695166c1f103. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/US6R21323518.
Album Centenario Roberto Espí: Conjunto Casino, Vol.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc047e2009bf4a53f74a905012718bbcfd0386dfcf0f470eb877959e45374ae. 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/USV291376770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a2c9a64df17991a9711c9fa3b2ce99ccc5595119fc13b66cd96580731e1870. 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/USV291376780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547172c49a4dc51116b6b70affc637d86364310fc9759da8e0acd574924df70c. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USV291369048.
Centenario Roberto Espí: Conjunto Casino, Vol.1
Beyond Patina Jazz Masters: Conjunto Casino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bdddef2249abe1a4819ed85e3a17748e0494f180d0bd0150ef364f659d0fa4. 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/QMFMG1395936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dd9224d0112d93be74f18a73a02133e3f70f2a07ee93a97fdfbd3a8515a360. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/US6R21391904.