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 0xf7afebd2bf6df4376cb8ea865fd5ac48b5f4b7bda8cc3fabf0f07956470fe8b0. 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/5c1d4364-1fea-49e0-a3d3-055ea84d47e8.json and https://artists.proofprofile.net/proofs/artist/5c1d4364-1fea-49e0-a3d3-055ea84d47e8.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 0xf1a00243af3ac829451115e3f2a174bed78db9ab7f8ec7c34f4aec607e56cad5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:13:38Z), 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/RUA1D2113544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca4aa64c75a9cb927aba432f45b822d0c1753c23158faa7607787cd00a3dfe9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUA1D2117601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3ade647b1278fa0e35f7b5c7f6794f72bc23d90f5ed7ed8bdddb7dfbb87bb9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUA1D2249240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3b89455d5603505fa3310c15b2aad78a4ab6abff415f0ea3d43b561887f69a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DGA052264188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef7d736b1ab92e118ffc1b74eeaec5a1527b71d3a143fdf5422a43cb3179c89. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:05:09Z), 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/DGA062201591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33035ec963d5885781834b2df66a9d5caa90aa9fd8ce6f42476d972393181ff2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/RUA1D2144054.