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 0xbce49c5d20ef5322cf316b34a6a29ce1cbd21b3aca585f59d5174d2920b5f020. 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/add31896-59fc-4712-b45f-439012482050.json and https://artists.proofprofile.net/proofs/artist/add31896-59fc-4712-b45f-439012482050.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 0xa13fb853c91c1ed640515dcbc53d254e7e409450ee5a3604b32243b879c3aa4a. 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/AUMEV2368002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df0be193d44f28e03d48134aa0ff09a1f4338bfcf463c54a3868c2bb1491b4c. 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/AUGBT2222908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e314bfda0102cc478adedc2428acaf0c3ab50453bd0e345710e2945123d755a. 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/AUMEV2135443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ce106fec440a53540c54e507da5d900b98dc0d17ee79a2ad50d422a46758fe. 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/AUMEV2137399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cdbf82603e962957888e8120bb299ed9b20c4abd34ee2d72d26cb96af3ed36. 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/AUMEV2217995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2a37b2ae8f5342e35d4ba86f01f24dd4759a74d1d68046cd4edf17dc8ff275. 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/AUMEV2452611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bc4bd71123aa15af6ee70467966d341eb170d4fc4869d169dcf8ea68e5f679. 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/USX9P0621791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa4f705ba80e5beba12fcdf5dacd35b926ee0de3c34b82470a3d924f5e92d96. 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/AUGBT2443282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb597068ac322a7dc30777afcc678540e91cb3e44d8d7fa7be7e38659fd42f38b. 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/AUMEV2490967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7186212f2460a789930adddede54626dbedd9ea71c53bea1775e858444a19461. 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/AUMEV2474674.
Traditional Macedonian Folk Guitar Volume 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd50cd97cd16b79f1d10d0aeb827a942768c4e086a5cf64cbc77fc6b70cdc7d. 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/AUMEV2455434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5aa688c46ae44c6df5f122841913bbd79782c2a9f1ea709d950ff16e5166295. 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/AUMEV2419783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49da616352bc813f741a26cea5fc42cea3b71a9cca8f8fa77f05b431ac64b81e. 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/AUMEV2418379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbae62b495c3dda9145c77ba4ea1b04b94efbcf4c47c0d025ea98b64bfd491f3. 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/AUMEV2411866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34382da4d7f4d17a9c6512a41dbca6ade100199b6b215606b05dcf9494e1412. 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/AUGBT2353147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef90cf24d19c3f412edf5cd973fd462b03806be0632f4f23be82fa3cbc20a1dd. 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/AUMEV2394337.
God Rest Ye Merry Gentlemen (Flute and Guitar Duet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d78e6e09735e3dd3b242c7c0f4a962ca4d9748fe2ef3fe5e81b813752651ef. 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/AUMEV2383164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e027532683a794a12bc8f967db00beb5d7010df5a853aaa807c656a42904e8c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/AUMEV2377675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06214e819926b620e51f0493bf10a55eda986f0fd1fb602a4ecf441ff0f3d791. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/AUMEV2390569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822a921e0afd819ceea066134d6da0ac69caf02fd021134205906161d0278d93. 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/AUMEV2386557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96ba9a4e87cff427228dbad6ea17963ed07b5ca789093abfc334d26abcc5cdf. 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/AUMEV2373701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73837766c57fc6ebb2a7bab9ca3693574485552409ca1edfa37281172f9a8e32. 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/AUMEV2370430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb544bdf73ce7d617ae91e93fc9a63cbe4607c9756bedd01a562934e359bb56c9. 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/AUMEV2360955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd3715459ba1feb5e74e9b30180bad7ad0178bc541599a01f5f46ddff2910c3. 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/AUMEV2358662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9791057b2f75cb879311465dfc385516d62043805baba6ba3f7ce02221483b2. 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/AUGBT2235476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afd1dae27c140378a5f4a67848c9972381597550d58d51bb3d59e8966c7d1ce. 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/AUGBT2220782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe126527d8fd2621b6b5b804f8fd58117f9ce0f5e7600929b7cd64f6a83a5e1ab. 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/AUMEV2568983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39017bae0664ab04e3d1ce71a62cfc97ceabb5f9a80bbd25046eb8c5cd884793. 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/AUMEV2552192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d337840ad8e3c8254b16042b84ad1e124776aec9a7bd35ec96cfa783a7dec1. 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/AUMEV2546154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a489c51c8c479b7133e770e9650e3e2b3e9752cf92220a2039b410cc051ff7d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUMEV2509651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc492743cbb5207c3ae66182d9b156d9323be07006a2efa9aa390dfcc3fb43415. 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/AUMEV2503012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362e8db0f41253f2aa34eeb1c3a96d78f0e4f46b798181cb9a9307c25c4c8039. 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/AUGBT2485906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338ba9cd1c1a9a066610e1314188318073db21e6d6ae74eaabedc4ab2d7405fb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUGBT2488196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4966913b23997b9cef360c20db57b6d44290e17824235a3da62c56bbe0dd2d37. 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/AUGBT2471814.