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 0x610dcbd3129ad566901ba9e25a81e71eca2715d948ca3303f10727a0a3008dbf. 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/755b7974-e5d0-4250-a6d8-56857896791d.json and https://artists.proofprofile.net/proofs/artist/755b7974-e5d0-4250-a6d8-56857896791d.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 0x39241cc787ee26b305963fb713ad3824593d11081075fe1729ea7e5afae7f2d7. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/NLB930401461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05297eec68e7457a9796035a13fd56fecc62a28b90283589b289de3ddc86e1c. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/NLB930401462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01f242f4076a903a61473a93966fdf81401a16e75e73c64fafbb9465c0a950a. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/NLB930401465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbeca1cb5d0fa48a0987d7a17e649df434d93686645dcd61227c75ab841e39b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLB930800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3db7485f7fdfd2316b84e76702707ecfef7d0cb5ac4dcb665770e2f756098d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLB930800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32a24f578fcf012b2cfd719b2e03d52007f1c1978c96c3e8f4cd7ed1cc9fb28. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLB930800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2067a89825e4f9b0d69f679d64497ce24fbd49491c4d188d5d95cc11efc89d03. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLB930800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b330920a34ff6b61cbee1f377627a453aa7df775c1530fa04249b3dda3f3196. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:42:27Z), 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/NLB930800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd62375c9ba47bc962de567228e4f30ea0a46344f66623759612dbdc9b60191. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLB932500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436544dd49868c3e8024a2c163acaa937d8113f3d79e4ee477a2ef9ea18b19f5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NLB932500208.