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 0x85229a8f6ad365c5f1c6257e19900e8c50391dbdd91321756c736894e6883f4e. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef40f8cd-3ce9-455e-8cc5-b5f4c1d4bf89.json and https://artists.proofprofile.net/proofs/artist/ef40f8cd-3ce9-455e-8cc5-b5f4c1d4bf89.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 0x7846e1d4b1e390f9b05213e85e690f16da794aff530a5e74e3e74f4ee687af9d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNW72404475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40faffb407a8753a76160e05eec3aa223063c6d122787ffa75a2773223f346d5. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZNW72404476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a452545fe9051f83f7999771d641bb62c709bd31de4cfc15aa049355cbcc255. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNW72404479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bc8296d141f851409e804e3e514b62e6960645c7f1ec91b1913b5831f06eb3. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/QZNW72404480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c9f9d1023a38828d6fc6b7078758c38c038b7551379d9221b581e30844c375. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNW72404481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec7ed2b10ff055e60fa76064d8870e435e1cdf1e3f15062e983b24e19bdad45. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNW72404482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd65ba5a6f686997650cf1c393c1c3c099b933e9a78e856923bde72221d50c5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNW72404483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00174e26cfa6bbd5e8ccf419c379e24c10a1a0c9abedb71213eabd21c301a7ec. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZNW72404484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9940caa057a02f0ecbbb8874f5f809de6deab8585f0efc9c7e53fd82cd0a84b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZNW72404485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8232224c9cf2eb9bbbce1eb6dd3ab281e83f564dcd08726bcbaaf0ed47cc460c. 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/QZNW72404486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d05ba084b304cb1fde97791d155ec19a1777a3ca24d2bd2304e983a338d9ac3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNW72404487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3935b2f2e3c76a150eff8cee5fefa9c49576d6e4a9d476c3d349b5f26f564962. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6TI2330003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56c2cee9bb1b3353522cd8e24de7758c907db8835685909eebfaafb470a3674. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6XW2385799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74a488451dffa8e7c60ac6af0868bff9defc8d5b8c257a260d9e02f21812a3b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6XW2372678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b275baed88bf00ecacb32a2246ca102771598a7ab47919429c232ba0e95f91. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SE6SA2361043.
Regresando a su Raíz... Con Banda y Mariachi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7646de886c298608135a235251ca35dc4ef888e27c478572d1d96556ffeced. 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/MXD481804367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1861e4626627ba47deaa988f8b6be5629b1b1b613931a5d46e55e2d86f79c020. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MXD481804368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b89d8daba02369a60f29bbd1bd321cb0374823e21f80da7333e5493f67521f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXD481804369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883eafd1964372690325824eb8374151e6423fe5218332e69ba69c9d52ce68ab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MXD481804371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc904d14e22b76a0bda3d4707a7538b7b25ba664af7570b0757e69277c6293686. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXD481804372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c70fcf737d97722d8342afb75e51cadc82d53615ace6e4d3e584b796133636. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MXD481804376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c1fc17c1d61fe0a1204ec0e976de63ae23c13bc49714adff16d8bdba420ed2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/MXD481813072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe380dceee016753ca961d72c271bfffd003cc4b1f792268f4edf79711d64635e. 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/MXD481813073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58768527268854f5add0b93763d6c49494483e24dec63cd49fc4d4b08b0496fe. 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/MXD481813076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8c2c9767c091f4639c1bde90bc8f3f46867d875b9831e7cf760eaa7bc34b8a. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/MXD481813077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c57f2d54789a31a741596a3b5d002be563f461b61e331b69de2b9929e46527. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MXD481813081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506d7bd47b4bd45c5bd31db32a49a8e0708e34a0f479c3878e877b733d008768. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNW72408413.
Popurrí de Laberinto: El Árbol de la Horca / El Cedente / El Indio Enamorado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc544197d903d43d65683cdaf0cce6b2cec84c6ff39214a248b2c0a7eddf261f6. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/MXD481813105.
Popurrí de Joan Sebastian: Carrera a Muerte / El Remedito / El Charro Viejo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4a90f1d07720255ca09d9f4e8c1c45b112b339af6ca24d44dff1fbc5e56d76. 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/MXD481813104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f455f0fa74e50eccb2d172fb11603ebfe50d6da9a9c7206db8b7e1397c90a8f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542321842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcb4c768b9782796a1985dc472bff02e7adf544cfb8d5959ad224a5a976fd3e. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/CH6542321843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8094eb897aff7cfa930d92ccf504694bffde688be3f9123ac8ff5604aaf3fd. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CH6542321862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8ed866d6dc3a166758bd1b6380663ca7057ad98aa9e0546e50f2e91f77b7b8. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/CH6542321844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a23adbef54ecb6c0e7808a34d637e39a4d871a6fd6951099a8fab9885100f9e. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/CH6542321845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05faceb0159e1debc8512d87a71791e2520b9e1f03896eb61d70f0d21927b582. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/CH6542321861.