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 0x353818d613047a4c586f24297cea6b97afbe80a0bc19ce9c61f6c7aa7afc9aea. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f1b35c1-12ce-4b2c-9256-53cf7833ffd3.json and https://artists.proofprofile.net/proofs/artist/9f1b35c1-12ce-4b2c-9256-53cf7833ffd3.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 0x1e366e53d35f600406bf38729654d5dfc84d30e5159ddfe42664b7dfe23eb12e. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:32:32Z), 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/QZ8LD1736378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c4e2a9514387e4e407c123fcc91e54e7262e6d981cbc070954f51c723c4612. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/UST8K1830210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1ff16945bbce870afdd4dd2343e7f61675ca87637ca624e5479c4b311a36d5. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:26:00Z), 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/UST8K1830216.
The Free Streaming Music Project, Volume I
The Free Streaming Music Project, Volume 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333b1b82bf88da0a3a5d1bd305eb665fee00996e5497d4bf5649bd27fe1bd306. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:53:24Z), 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/QZNWR2076502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca0e4b0c45ba2d08e466ee48be0ac1295a3cad952d58bde77f7a6f708873a8a. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:51:48Z), 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/QZWFR2515590.
Treetop Terror (from Donkey Kong Country 3: Dixie Kong's Double Trouble!)