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 0x1692412f98b85d22d2265795dcb4f993de4c109130d0d6418e99177b7fca3a40. 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/91d4a72b-b889-4a5b-b9b0-eb53976861d5.json and https://artists.proofprofile.net/proofs/artist/91d4a72b-b889-4a5b-b9b0-eb53976861d5.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 0x48da0fc4765b92fce6b1037e739dcf64ce1819a28f44c8c33c6ef7d6721374e9. 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/QZ7R41851447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9baa186ba29bb2d2b9c5fb7f679179a1b1a07c42c8ec1776fa94be1b89b58e. 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/QZ7R41751482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb342f713b20c4d99b241176da05ad980146bca0671c6339f887eefb58f5049a4. 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/QZ7R41751486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8199a3633d8c054a8d2093dd0ac87ee7db151cf04f4274d7cce6380419e0ac. 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/QZ7R41751491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7a591fd044145453ef3d7c0c8d7ccca5a21de3627541ddfbf67f7b2d5a34ad. 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/QZ7R41751496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb5bccae5a38df0ee822ba9aa01546c0c62a70170925d469c0ded72c877b457. 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/QZ7R41751498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2303c4adc33a273f369102552f46172134ae3a0ffd140780c4f0c9c021cb40e0. 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/QZ7R41751502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab196dec1766e38fcaece43dc5711796092db19afa3dc099ae25990c90f4ecc. 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/QZ7R41751503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4419ff853b76637d114b920564ebcc75774e04f7831091438bb9b6ccbfa4259a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZNWU2233749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e42eca45b03822080153a153d78556f482006c517ca7620d920ee82ba5b26c3. 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/QM4TX2292367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3acdde330a0faa2e38dfb5149b2aaedf3477b564c87bd65969fb8615c2ed48. 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/QZ7R42152256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec8f95a3e83974707f7e0d47f6c29b37bcf7167d56c0fac5734bef2050d7a72. 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/QZ7R42151969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c49e72fef08874d6a31d533a5cb27a7940d32cd23f76f9d1708c73be4a70045. 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/QZ7R42052722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c844073d79a1ea96a0ff67fc58bf88c2b881cedadf169d94ee49db304295afa. 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/QZ7R42050312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe531c61909a1f5feaff93cb4337d49ba3a317b4d9cb83fd76c80c121e1227176. 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/QM24S1910547.
Sinfonico Presenta: Me Compre Un Full (Trap Queens Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd156edcf56be2fb9e91849d4f5fde14fed168b0302814bc2935612c00072eebf. 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/QZ7R41850413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177ba41e4e2c17063a73bcd5752ad0bb59db128827c3656f007c37a865f2b9d3. 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/QZ7R41850114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038c0559ae38c63c6ef57ff5654f13e075e4ebd7e285f5747b3f8c8859f30b83. 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/QZ7R41752038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277361feca6033e1bd5fc51480845ec49e7619225a80108e25e386f662d432de. 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/QZ7R41751954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cfba938871649dde5344b6336013d02769cc357f8f13fea0fd918959dc9800. 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/QZMEQ2469533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63a3021b3e9bfd659f48148c9cb5080147f5cce40f3396164d934587a9dfb1b. 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/TCAGP2207755.