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 0xe4995291c031ff7ace01eb933c196112cd1bf152cee58eb6912a8db6383e22b9. 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/b43b5c0e-c675-4caa-805a-1f17eaa6d71d.json and https://artists.proofprofile.net/proofs/artist/b43b5c0e-c675-4caa-805a-1f17eaa6d71d.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 0x0b664687bd666e06a2e14e719c3fe4ffcddf277f1c4816f4db978c7c3776c4ba. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/MXF018000116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837dcd3342768b0661ec65e4ef8057dc951399b47959367770ed04e147e7e8f6. 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/MXF010001000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864f77c42dd95284b83d8a42ea3d0deb719c6a24e079d3a020121c8751d949e0. 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/MXF019200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb46a4f614e42baca12e51abcf47cc6e68920fcbc2cf9deef949ebf8dd914518. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:51:12Z), 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/MXF018700995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabe9f567582a82e63c3acea87de00d0f10314d46b21368b718c227d5ddc8aa3. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/MXF019200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261e42db8c067aa6cc1a0c65717c735bcaef7e2c9c2fcf58aad6c5b4c0ecb884. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:46:23Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF019200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041109ac2c679898707c81d901c85429d4571ec437e6a753dc4383d11b96ca8e. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:22:32Z), 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/MXF010001007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b029681b826c3129bb883da28d0c9a5cc236e331f0e7765969f89cd9ef86c3. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/MXF019200203.
Tesoros De Coleccion - Maria Luisa Landin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d7971c514644a1813aa511d24047f7023c67c3edbefd217b5c07464c9477ff. 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/QM7281417920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079b40ebdce8a646b34e8ac1cd6ac4cc282769378c30970e27db23cc70fa3022. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QM7281417921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5baeae667dcabbf38407dbd23d43613f4db158198ddcf1cdf06777e7a0b2e8. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QM7281417923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8ce1b61bf6db3cc80e0de8a834cb4fe9ead0a7bafcd856a2c9529c8879f23c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM7281417931.
15 Éxitos de María Luisa Landín - Versiones Originales
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8542517892b8af6d2851a34aa13e843a4f13de9b2c98083b0148d09f373c70a. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/MXF019600523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b029681b826c3129bb883da28d0c9a5cc236e331f0e7765969f89cd9ef86c3. 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/MXF019200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8628550ed9e693f3f1b5785dfbdfb5fe488242bc28855efcd0b9701a56edc5. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/MXF019400519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716c988fa224a339d521a22019a46c505791b41ea3bd74e9a99f1913ec0220fd. 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/MXF019200207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531cece39835523e75724a7d06e8474956369ee87b7a1687159fdd582bf71607. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/MXF010001011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261e42db8c067aa6cc1a0c65717c735bcaef7e2c9c2fcf58aad6c5b4c0ecb884. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/MXF019200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce891d9fe6a988a6dd4869b2d784841146239aa08e0e4f6112d3067635934f1. 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/MXF019400517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14adc3dfef7ec57d198c235e40ffc258af4a433b09968de8cf2da61cc5320e2b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:57:57Z), 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/MXF019200197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4713a9a5a904886b81424c2d0cfba816cb08c39dd7d529949ebdd6e3e45ffa. 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/CA5KR2058898.
Antología: La Reina del Bolero (Remastered)
Mi Amor Perdido - Las Canciones Más Románticas De María Luisa Landin (Remastered)
Dos Gotas de Agua: Maria Luisa Landin y María Victoria, Vol. II
Dos Gotas de Agua: Maria Luisa Landin y María Victoria, Vol. I
Essential Classics, Vol. 972: Maria Luisa Landin
Tesoros de Colección - Las Estrellas de la Hora Azul
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b53b0dec1d08f8b836b39ffa53cf6388607cb505ade87cd571781a3ae172ce8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/MXF019200199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab440e31db5ce7c11180f796ea3b10fcccd748288d3a9e9d79bc711da1c58b0. 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/QM4TW1602797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15e55b194e7dab4d2888b3313bf2ab4a0586e494a2b4632d0f801ef34a8e7bc. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QMBZ91607615.
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
Pa' Qué Me Sirve la Vida (with María Luisa Landín)
Tesoros de Colección - Los Mejores Duetos Rancheros de la Historia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec1cd39303510cb3fadad402516407cf7999a2e4faff0648e10a65d0f7d0e57. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/MXF010001265.