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 0xbc673d25d1b1722139976cb713eb6806ef138062a7ea5b05595aa08505eb1b19. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e8fe83f-24ae-4459-83ec-ed42bb71e6cf.json and https://artists.proofprofile.net/proofs/artist/3e8fe83f-24ae-4459-83ec-ed42bb71e6cf.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 0x043969f88c5ca149e048ba5d57d4b19f9712c3c279831d3c63799b100dde9c79. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEAF75104033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92cf5d113a0686374d50b0e5e65dab8c99ec36a2459a767a196932912c6a994. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEAF75104035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa7800e2cf38125be87a86b6fa893f33da676139b63a01d4835fc900b4232c3. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ES65A0800285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf855a6320ec6c01440f55953b493f799e70250d1e705a65f0f9dfbc18c45f406. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/ES65A0800286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ff303af5419c06f34d413c1fa17b5d3812c7cf7c042d90e46c8bca0164ba54. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES65A0800291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7becf3453db3ec5c26b1abdaa1c307421d165f27c7b035a4ddc2f3ca31318802. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/ES65A0800296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aaab093c8f7ed1b727930b6e754befb021a01424dcdf159be72dab3a7c60128. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES65A2100205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d347de8c1653ebf1bb7e9e029e0a719298e52b4778bb04b6851c956fd018f0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ES65A2100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfead6f411554af3c267f178bfd7ecbb8533a62e775b9b9cc2358ed0c14bed656. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ES65A2100210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45521c1b41653775b21edcb5db64b529f5a5c1393c079b6268727b0057e773a. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/ES65A1200722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e4367c1830154d22877fa3e0cfb30924fca95f83cda3c5a8e516ec3bd17471. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/ES65A1200729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea523ca19f45c8aeec0aec3d51031df5428146346bc28c07d303a7e5d33abd2b. 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/ES65A0800479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cc2b82d39d734242c630999bef0300b60463624c75395dff51302d965e6f9f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES65A0800480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c221b8daceddd290f40b9f56a3b7ca4a92f1328003783787237eef3806e78bc. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/ES65A0800484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1760eb149cd673c04352bbb6f203f7bd5234d7714d9fd883cdd007bf28cac0. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ES65A0800485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da2c2a14bff26e550fd72abe45087049498c6d6552020e50f1e8dfedc8cd28d. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ES65A0800690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59934b69a4ac32e0312cff764e6b9e8492bf9588de449ad790e60292aa8b0fda. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ES65A0800693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7406908dc7ce545980ee874573b9f9713da422bce66f46d65dc1205fea7e728. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/ES65A2500009.
La Morena de Mi Barrio (feat. Sonsonete, Requiebros, Las Grecas y Rumba)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065a7d062d642a2f66bbafac75db228f68970fc50e8d939df1b466ffb7c4752f. 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/ES01G1201560.