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 0x36e35c5523f0f7b38b53d9c2e7feafb76887eb8d0f64d714fefd6f18d82d6d2f. 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/4a8a8e85-789b-499c-ba1f-0f3ce855c1d8.json and https://artists.proofprofile.net/proofs/artist/4a8a8e85-789b-499c-ba1f-0f3ce855c1d8.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 0xb0ae38e5525e9d46246301ba15c80c83f902bac9d9311c3b7da184347f2b8203. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE6A92194377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bd761f038e772a68a3085ef66b579ecf437b96d31b3179ce028b4b272eaa6c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE6A92194374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340ab832b085c9814202188f83626712309e685f7806dd25cb5a0e1c497fa706. 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/SE6A92194375.
Popurrí Orbelín: Son de los Tlacololeros / Son Victoria / Son de mi Costa.
El Son Del Ocoxuchitl, Los Diablos Alegria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5063807fdfebc9b2015f116e349fb65aa0ff11e99c9aeb18c61881c0781ecce. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZMZ92374301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a76db9f475e264398014d405e907974ab1ea0a2c776daed8964f5e02b62e26. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNJX2320036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb1abe4ecce364c68d39c7fa9d6a55a92df101732432094a33746f2d79d08c9. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:09:27Z), 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/QZNJX2320038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c62e5e38d2690c259b8a6605eef20edd0eab04c267a9a6ef35a308694a8ef3. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNJX2320043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed37b5307d6889608c6d7f536353d758b2a00c9e87b41bcef20d1f10e83a9dd0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWDD2374130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b908cec8f8d51fce429f39ac5106bc6aa434eb52d62b2259b3e694a07ed84a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTPX2396524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe980e7a255e9f9181af226cf8f40f8889487c1de862166f3d4ff204a681adda0. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZWDE2365060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5023423fe2eddb6455931a6dc347996bcb21add1e69fa63e101dc0c67048472d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SE66N2310064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210b000875f10f4086ced607f3f0d819fe19a079f32509b11d6a6648f2e37fab. 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/SE66N2388469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31aa250f386541e1daf474e6de70acab171b3af7adbadf891411fdf33d9b635. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/SE6XY2372304.
Sones de Betaza, Son Calenda, Flor de Piña
Popurrí Toro de Petate / Son Aparéate/ Son del Chivito (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf730579b72dc3e969a894cea730c36848ad854d06b90136cd9612aa67e281428. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTVM2511030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c5401bf33ca0864880111bc97a292ea0804ca8446a5737f8c47a677bb477b3. 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/QZMZ92205650.