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 0xca7f178df84304b557ad3b25cb4866cc7b0b029e8e18d9c6bbb5c75df3191032. 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/6d6777e6-0c8e-4667-a269-d133ed168236.json and https://artists.proofprofile.net/proofs/artist/6d6777e6-0c8e-4667-a269-d133ed168236.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Potpurri Cha Cha Cha: Rico Vacilón / Los Marcianos / La Mamadera
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 0x8cb7b30d205b3868a5ad449eb159c6a8947edf90fd4187111bc923ba69c9dff8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971403067 — a six-check JSON result.
Potpurrí Ray Coniff: Besame Mucho / La Manera Como Luces Esta Noche / Extraños en el Paraíso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd74adb5e836abb173e9785f17060be9391a9eff038e5cde0f88ce597641871b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971403069 — a six-check JSON result.
Popurrí Mambos, Danzón Nereidas y Varios Más
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85723d98187899f6396f20a617de2fd1570d79867acd0ccb904c5bc6eb26b6f. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971402981 — a six-check JSON result.
Potpurri Mike Laure: La Cosecha de Mujeres / Tiburón a la Vista / La Rajita de Canela
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ff2a3a00e5900d24529605c82c5e4ab908fd9543d97bc63945f556519cf11a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971402982 — a six-check JSON result.
Potpurri Rigo Tovar: La Sirenita / La Calandria / Oh Qué Gusto de Volverte a Ver
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cdd19288db653a6935bba0c714d7a1dea5a7e31ee9a80aec105675d1675456. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971402987 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf8733f77e7210a7ff0f72482369b89d71d98d67ca1385cee6132e8b658c237. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971402988 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8e9e2c6078f3b4f7526332c0606da3ed0caca27c30b0068ed1f39dd825e7c1. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971403038 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24599a70e5fc2f95a078d9fa7c3dfb7f5576d017e3dd9ee28d37084caf9b7478. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971403039 — a six-check JSON result.
Potpurrí Luis Alcaraz: Bonita / Viajera / Quinto Patio / El Dinero No Es la Vida
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d041f7e74f510bac26d4febc1d6a5f9d71e64161ecdb9190774d7974248c0e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971403046 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdf131584732927dd314555dcfb9df0e0f07f520a186c17a7e3ab331a6d89f4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX4971404591 — a six-check JSON result.