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 0xa6caeea1bd056e88d4a97040b2ef0075e2cc49a675ae997c54c52180822f492e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67f27029-286b-40f4-b824-2a8843da3a24.json and https://artists.proofprofile.net/proofs/artist/67f27029-286b-40f4-b824-2a8843da3a24.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 0x1d99a68480fa86a04ee5cf6fdbaa808df10e0947263f13088b5eade8524757d8. 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/USA2P2229648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b43f321d0a9ee64b4060715b4513a266e9d03cd75486d78316085e7efb4e08. 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/USA2P2229642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a415d4dc878627178c638f8023c004dd4b5ab820c34c6f4f8c79994f72da3b6. 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/USA2P2229644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a09c6cc00e2cb22e74e425fa70cf0eab3e30649b725a5683df5add1b21c15e. 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/USA2P2229641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99db517676fa2797343097ce0d0b3e363c5fc20ed6870e13849a3ed477418c0c. 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/USA2P2229645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903d93e324d02b4c30387a970a6443cfd0945fff1753a30cddb0672ba241b7dc. 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/USA2P2229647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb99523eecb0dd66e2961563705a8604b388f1e3206d90eda59bcf092f8f7503. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USA2P2229643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a21ff1dbac82fb098eb18f73812079bd54ec5d92d3024d719256b7565a544d. 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/USA2P2229646.
Wake Up You! The Rise and Fall of Nigerian Rock, Vol. 1 (1972-1977)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf600cc4f4a01248d39dd6b723e42f2b0269ffa4d32b74dbb584688b7eec847. 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/US2S71620001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e78d4ee4b7e80dac55d4c67eb93fd3e3b6bd2a95693c3f7d47d8de2d972c805. 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/US2S71620003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11a9b5f02db5badc08f06cccca70fd322a07edbd1d18b907dc6f5f04853efdd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US2S71620004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d55e111397143d56b5c747a8b1ba91f898c09ebc92c2cbf010f7bb7cd474f73. 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/US2S71620005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42088de847112475e609837fce36febe7346446c6b06ad42ad30692a19060ec. 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/US2S71620006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47768bf0b7e96b77664afc3fa296356820bb9716c0ea1f9e34b42290e9e626c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US2S71620007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132aaee1afc108da2faa8e9e2deda46a8cfcd840ea175a55cda695b6b2162229. 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/US2S71620010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4962403a5f837367d8c0e3de4b58eb5e59d3eff9895cf88379cf1372165b03. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US2S71620016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761268971e828ad8e6f649a03c4d4a9d9558c8b2c34412deedcefebefe799f42. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US2S71620018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee70daae90a3386c147b39d7dce4899a473c43a3fd13d977612b1bcbca2e14b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/US2S71620002.
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
Wake Up You! The Rise and Fall of Nigerian Rock, Vol. 2 (1972-1977)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c199d54c756a20cc22db33421cb042883e25bb3b7a88c863fbbc3936e20e0da. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/US2S71625001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd2a45a0dae4bbbf79b0d402cf3f669ffb8d5c1dcb2eb247f8db4de7f57107f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US2S71625003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd153e468daab1c5796b89c91782a42586c10b06542d2ab59eb147899ff6fa2ec. 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/US2S71625011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36884942803cab0c93c980e689f01f56e3b3cf63f74a69ca6058a72c70d59c1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US2S71625015.