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 0xbbaec99efed62f1b3500ef7619eff47249a25e932091cbac78d0467a0c231a0b. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7129a622-a1c2-4687-9803-6bae9b77a13d.json and https://artists.proofprofile.net/proofs/artist/7129a622-a1c2-4687-9803-6bae9b77a13d.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 0xdfe474c773a42b76de3dc8646a754a3d5d1a3a63d15bf38fb3b34427a9ce80a6. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBSMU3813510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac5411c56dad79cc1183f1348a049b78bf2719ac0d32815e4a8854164436539. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:55:47Z), 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/GBSMU3813511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6fcbb8c9accc0442eb742ab53692978c8a6b5fc4c4dad5b960a47fb7c4e24d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBSMU3813513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80273015d8d29375cb88be50679b53b4002e4741b8bdbf6755975672b149d3da. 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/TCAFW2114893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64ac7917626aa8ede4ae30d625916f46decb9869668138460de8b2aad1f236d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJO2585573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a8074e298316c889ae133c4904b822d966c49148f5039d3b0ea0315ad44aed. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCAJN2585585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbff482495993ff363234c8ea8eecbf42173cd38d106308d7779d091b51a076. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJO2585592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac69ad3dc6594db168b6b585b71efcc93eb299cdce53b92f7b1b86e3f54ff3c. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAJN2585613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2aa55f9ad1500c68b6325fd129fbcbba3689cec0fd5156c06da727f9e74dfad. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAJO2585641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b624f1050fd4688462b00544cda2508007673be55192d6e97a77a94e5276d15. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:23:58Z), 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/TCAJO2585647.