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 0xc3bfe770afc403fbc65c133021595807514d823bdd73789791079298c5e9ad72. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b523a346-50a1-4fca-bc02-78931fca3361.json and https://artists.proofprofile.net/proofs/artist/b523a346-50a1-4fca-bc02-78931fca3361.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Añejo Carta de Oro: 100 Joyas de la Música Tradicional Cubana
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 0x81baf1ce7fc160c1bdfa20c2414161002b17ac1525c370cd6aa6c382f3c0ea7c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CUA021306773.
A Lo Cubano: Súper Hits Bailables, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f0563169a16525851a4a920e4b8c445479b483e1383e2e1a5c470004e7b224. 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/CUA021309258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf47d95d01d4efd334fb79b31f04ed03e4a01b09783a81cebea4a227aea17d41. 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/CUA021308979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a1a80b79efb7915fff9d2a854b94a4c1ea3ed7d9baed8b4733474f8879ff6f. 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/CUA021309364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5f2f8b0db792abe0cfdefb62131bed5ab0d8c71ec2012e6c749c11e8beae0a. 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/CUA021308588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ec8630de043fd9277038c2f34dbbc9d5e7b6c3cdd51e125b2aaf897d7bc734. 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/CUA021308755.
Serrat Encanta: Cuba Le Canta a Serrat Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2ba97a3a6c7ee7c466ef8e8143ee2548ec75f400711b4cb4998cbbbea05f1a. 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/ES5300510015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3614d214683c5b594d1c212ca71d8a9dfe1ab88f59020b3823eba448fa40f52d. 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/CADC41104008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5dfbbc0a139bd9bd1f6482785f2fa2c063f2f690819800604268de1cc1a58b. 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/CADC41104011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3766f2a1cefe009343b59fbcc4cbca708ea0d7caf34f9cf8d1857cb69f8986bf. 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/CADC41104020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4506fa72bfff571cd7b23b46bad867db62d079661bb514e52009644ac427ea. 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/CADC41104022.
Your Holiday Soundtrack (Cuba: Selected Latin Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942c57ffa083ae94193f81f74533db98b11109dfe8174e1076356a305fd3a57f. 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/FR6V80180635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e1a6afd3486e88282580c397c33fb211c8f77964ca1c0f7699e61ba8c27d72. 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/FR6V80180643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a93341eb46084bda62c48df953b31978ec25957f364a24fe3c795e9e7370b9a. 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/FR6V80180637.
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
Sounds of Havana: Afro Cuban Soul, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb5d70496a4f9f04392d54b37bd9a70929ab87260109e40cd558c01cb54c359. 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/USA2P2010181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe282d5645bcd7f9ca898423fbe135450125a8ac39d33f080378f2b1ef5b2348a. 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/USA2P2010186.