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 0x69ac90d9979ed8907709ff0ec55fe61248b4697b45f08d4ee63eb7c99ea9757e. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c82a0bd-d6c0-4350-ab99-09ebed794017.json and https://artists.proofprofile.net/proofs/artist/5c82a0bd-d6c0-4350-ab99-09ebed794017.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 0x52c7da29b933d1c12cd1e6ee6d4c14b13b3f021682dfd86679aa5f6a32fe49fa. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:03:40Z), 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/QM4TX2018658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbc967ee6ae4d730c4bd92edde027a5ad09aadf2cc2b5f0fd19d5d9920193c7. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QM4TX2018661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3601974cc1eb4e5b5dfc155a86df6b0dc153eda4ee05d8caa1b73f9b3b5c07. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QM7282058845.
R&B Lords (feat. Westside Gunn & DJ Boogieman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd89ac470dfa3a0cb50f13da3f7424df2bc8a707a8c0d89557f8978a7a6908d0. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QM7282058846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc256ad82b9ad7069089245fc71f3d2979fa63a3cfa2de9eb9fc642907278d2f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM6N22145406.
Final Four (feat. Conway the Machine, Roc Marciano & Trae Tha Truth)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dae019e600e078a6fd1322e200f4ecdb6bdf5ef2f8881c7b59b5dae8a60c2d0. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QM4TX2266712.
Final Four (feat. Conway the Machine, Roc Marciano, & Trae Tha Truth)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642a012c7a2c183d8defbceea0558963bf6be6a05269713c7789caabb52bcf44. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:20:31Z), 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/QM4TX2266719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1613b5fcf47d1ce859af7beaf62e5e5efdf6306b5dfffb61b0bdb0348b27c4. 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/QM4TW2265616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfa7a81c6eb5cb12fc8770b3a1b58e4d7884f623e96ad1ba24ae2bc5145f965. 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/QM4TW2265617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916d0aff774b77a75e163534aef5b666fba72d1e984900e718a4debee325225c. 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/QM4TW2265618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1541b8bafb677980406a79fb327b15b0cb405ff2b605b27707e27641c137c693. 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/QM4TW2265619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd7f66d754636d9b30e931a69fa1d1d4f4c27038f5b17cb1f7de516fd7a2d37. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM4TW2265620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cb95fe7ec19388f9a0cc7e321b0202c330d79f0569ee725884506f253772fa. 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/QM4TW2265621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27810c87839cf62f164ece73ff7cbb49bbd5232d8f1d6c27acb7d7985041254. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4TW2265622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94d78402f236be4464215f0a1bf58201ef1c1ce4c54aab29094e576cc9990e0. 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/QM4TW2265623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfa7a81c6eb5cb12fc8770b3a1b58e4d7884f623e96ad1ba24ae2bc5145f965. 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/QM4TW2265617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd59f21899c196f04a605b3da1525feb8fa945f7d15e07e067a05688a61ed5d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QM4TW2265624.
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 0xed41e2a3803d6463de9c6ec2a9107f2e1b59b7be7ae412e6abed631994c027cd. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM4TW2265625.