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 0x2f527f16fc0a2acc5a4fffd35841168046a5785b4fe5f94534c145f965446cf7. 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/0d0bf885-3e95-45fd-aa4d-f1fd042422f9.json and https://artists.proofprofile.net/proofs/artist/0d0bf885-3e95-45fd-aa4d-f1fd042422f9.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 0x6acbc4fd3c78cbd624400d09fd657d94c750272f19b2c93fc1f892e906390d8e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAX2407374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd19af269df4b69e8a5f0bb65f24dc76afadf708f4ecd40a0b7e9feeb4fa50c9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWS2492775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1060a28e9949808381874c0771a69460533bbe20aeee932577763b20b828bde9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEM2491490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e25e31ba1092b4d073f21ffd874388ad3678eaab4b0985b3a01b280e70c46a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6P2444184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8c31330407a0a3a0674ba0de0fa0e35122378e8d4c6ba21b770a58918d375e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6Q2477885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c13c44ab477ac9004b89b766f70084288419cbc62af0c82a249872a0ac470c3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHNA2468301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7166c5c2847c8beb4568f497c4596757c4aee8bb0dae520879f36dccfa9563fe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN82423922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74faaad4cddfe47663b8777454a926b825931bd282497e6d9a58be5d563cd30. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN72472137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b74cca75f8b062dd4a05650edc834f3d475743a6a6cebfa97c1281d268b2a25. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN62407961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6a50d11b4e1a3aa77ff6983d410061b7a1a4a9f2f567b0ab7e5ecfa78c200c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN42408027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd573d80e45950983dc58a8b96d4243b0309aceb86e627a16ae96dfc1cfd7f6c9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN42464603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a66d127ff24b18ed4e81457871e9f61cee9a9efd93b05d1727e15d8de9d61b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA82457738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1ff6498f2a34f5b7005c1b32af9e7ed365ab7b7f6dbef5252cf5f232beec4a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ62496046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd17a81ab1ce497ef8e78575465e6f57f01c4866fdad97ab70f20535288f82a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ62468074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd675933ef40ce310b808b6effdbb4ca2a494055d8717c66568a8d934c762a09. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ32476102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb619804f20d5ad878aee43f72e14c1c757adf680c28ea670776bfeb52da4b6ba. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ22415805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249c827f218b7839f693e12adcbf3621dac738e7e60e729edfd3ec7f9fc9d681. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFYZ2448415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a2f7b2f92e7da39da5e0bda162a5d10f23d4b098f96b1a9b9c12c59f2f89c9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFN2385026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f90cf580fff7a295155c4f0c0ad969646c27f19c604a72bd09d38cabc1485b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFJ2398272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685eef23855d50a51a9bb7284d4180e009c829f99c3e5d22c64f582d99d73807. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFJ2394621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4efdb136569031b969adb2abf267421c1e3ca634838bf483b7623696b94c463. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFF2390065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d89b0f341ff4e2666075af934672a40feae03b6c9b9d12a742c9d1833ddd71e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB72376309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8058eed0a936702fe7dce6e203578a021688878db486daefb1d1ba56f002f58. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6L2374269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb8cda3eaf38ad0eed301dcca4d7fb100099e7a634b9f355a801f1f4d3d3749. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFYZ2323212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d09242d17dbda8b431087bb2560945526e06fb7bc6f663bce706a508b430f6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZRP52210058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cc6d8322b1e0b62c96959452aaa5f4ea1bd5b5c4faa79c763c7e4cf6177f7b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWU2206376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09726d289188552994feb7f8ea79d6300ce7d2384852da20f998b3835847cc4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWU2206375.