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 0x4ead4d8ec84ac2932c97816c95d5a96049aba1f5580a959aa6033b49dceccfdb. 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/42a627da-b8ec-48cf-8826-9fa749ff24ed.json and https://artists.proofprofile.net/proofs/artist/42a627da-b8ec-48cf-8826-9fa749ff24ed.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 0x55cad19129733ea13d20f8024320fcf5d3d198ab5d232c7278b429de0262bdc0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACZ1729705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cb1346546df3a30fea13571d6645838b059d949fc29bbeef328d1cb13cc0a0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACZ1729707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46132372a82147373c4b67a78ce034f1c58d4365315113a6c50a2697875cd3ad. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACZ1729718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fead8ba1c7f8d4f1f4069117eed520d890b59596f9e03861b8b766a3fb896d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACZ1729731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a577af2f027847be1d87caf03738c503c748ed404b04ecf6970c30aaf99b97. 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/TCACZ1729732.
Duele Delux (feat. Impostores De Nuevo Leon & Los Mas Romanticos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2dca24f5577489c29666531e75371d46d4de4c8622b017382b981919018f8c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACZ1729751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ba4a4596b8a4b00063a27b92dd168fcea6ce3ca01de433342d780719c99f30. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACW1759174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8be848b5b250ff782dd7c05729100906c1b3672e7069ae6fa9044f6ff79da0b. 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/TCACW1759197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0928d2f247973eae298af5b24a3843d8c2ed21b7860d21f6c93e4bbf3b1061d6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACW1759205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e796c5c9303178eaf5f1d06e88d9e5fdcc1d711f82781ee7e78e29ed896405. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/TCACW1759213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3187c4fd54178acf367b7eeaa2acd24cce171da9c4bb6390e3d32f1d7cfa07d1. 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/TCACW1759215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f5f31f812cabd320cf61dfe45ccefda8eef66d286ccc25f1cebee9c7cc8a9a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACH1562998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd731be76ebc8b4616b1037d02a5530d45b12a954989786612d030193a81f663e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACH1563003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a871687fd3b2d95923b38f1af20f056ca93d77208bccc765f876a0bd747c195. 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/TCACH1563011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c351b968f476b7fa52debb739427c40bca1c9bb42e8d91f7ac152abd2a4eaf. 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/TCABX1476855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807c5ae3758fd6c3d383ab7bfbbc637e58525ef0d4d8ed5bee2313f1b7aed419. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCABX1476856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b9eb59eca741518a44676156867549bffb66cdc36a6ea60f75fe8b7ec29155. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCABX1476858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94e0a2c169972d49dad16712393f0d7626c82f564ab02c459a62592e4154fd8. 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/TCABX1476859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e8e3eee9679f8be1a9f6a5b1fe28c22e12a77c472659c7da2ebb8ce2c73e1b. 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/TCABX1476861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7c8ba074e56decbe711664237cdc05ea34e2db20a3b69986ca63ca1532346d. 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/QZMEQ2362956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6447fb0bcd6af02b61355db51c5692293f511885570e22c1204a914eb8045c2. 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/QZPLR2264134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc92878218e13d8d5cbcacc16cd60ec7366c0067fd48d11ae3e3db656338eab. 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/QZNWW2257435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28efdbe8008d2337d15a6c28ad0eab06f10cabca0f1a07c95151f4f795daf649. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:57Z), 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/USHM22078357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8072292f171405a81ae7d5b10248ef07a1b8d08fdcaed5d89fdb6defd79b281. 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/TCADP1830727.