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 0x0305f64369eb1d9f380ea3c9ace607a92e50671637262e04213cf008626a75d7. 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/f88a8b0a-2dd7-4e87-b25b-55844e2854ef.json and https://artists.proofprofile.net/proofs/artist/f88a8b0a-2dd7-4e87-b25b-55844e2854ef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vintage México No. 143 - EP: Un Anochecer
Vintage México Nº 125 - EPs Collectors, "El Bardo"
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 0x4f6a23a8d82f827af9a1d27e6444b46c750e80c9adbde5c7b39e2075d1bcc5b0. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/MXF366308830.
15 Éxitos de Fernando Fernández (Versiones Originales)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6909eae9c36c57d9ee20139d7ccbbd7f6be72ad2afa0160a1e4fdceb35d69838. 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/MXF010000942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d7a6dea3c2375fb62b59ef44f63b12a557681801d68d2e56b3f07f48e9889d. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/MXF019900256.
Homenaje a Curiel, Arcaraz y Otros Grandes
Exitos de Consuelito Velazquez y Otros Grandes Compositores
Hipócrita y Otros Éxitos de Fernando Fernández
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d22e48e666efd17535844483d6ed324b2740f89b626fff0f0dc916b76e651e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/MXF019601391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03550cf6cb089254fc7595ef940e9a876caa2afb6e41a02f5c9393ca753fbc90. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/MXF016700428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492442d0bf600ed69d38f4818e9b46e7fef099e4eec96a19716f0e81bf3b963b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/MXF010000937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f83aa2702bcb14c8a8fcb2d5c75befb9399c8601e43d7d37a5887de5ead843. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/MXF019601392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2628b7e165e9467c11bebb1293c0cf07f9f490f31258e4abbe0e7b194e233c83. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MXF019601393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0e8b4f0e5a636a640eace5ee206ca09eb54389afff5324f29786cb2f6ecd40. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/MXF019901147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637c650b576c1402d742b44ff742ca0c0d23749855e2bdb3a06f26dd90eaa959. 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/MXF550700525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acb2c116cce1797c8dff4a6724d502c33018e2e643efe868c1601da665e49f2. 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/MXF550700530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37df35a3a083cef1b30d5ad40c66db17ea6d078ed89e9577a12541bec9ba819. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJE61702541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c7a6a91bc1175062bd9924409eb28edce606c912515bbad29be1cec8ae9685. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF010000952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4c5f98d814b615fde69e42539373f5474b910bf60a30b166d2961a7e664da1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/MXF010000948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0754f2d9d599e103578702c74d487ebaa171563206f0401f6b89ec7e1da8f18c. 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/MXF019901144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b0b267134b9964ab46ea54d2e7bb93625f183a2acbacc03e69576247e13baa. 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/MXF019501750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6909eae9c36c57d9ee20139d7ccbbd7f6be72ad2afa0160a1e4fdceb35d69838. 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/MXF010000942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e590da42e5ddd607da59ceb8e90206d65a4e67a7b6ec0ad27c6ee8f8f71cd8. 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/MXF018200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b90035ad79e2bcb2ca6dc9a39cc895a8824e52b58b787017290580e1ba4b38. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/MXF018200167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc832f1b3ec69797d4ac5818391a3ae6e44d133ce09b0dbba9e08c5be24344a72. 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/MXF018200168.
Tesoros de Colección - Las Estrellas de la Hora Azul
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8989e06350bbb06e9d75b348bd2af9db119a8a80641c1bff1f728ab02fd4072f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/MXF019900251.
Los Grandes Éxitos de las Décadas 40's - 50's, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13e87e4b0cc2c69aeddfe74b2beb50d95d0fbf7bdcfacaec2c1a692c28685de. 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/MXF019601390.