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 0x59fde9a37a06808f46e636b776583badf746943142675a9cacacd274e668a8b4. 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/bd2acd30-c64e-4348-bc08-131ca9913210.json and https://artists.proofprofile.net/proofs/artist/bd2acd30-c64e-4348-bc08-131ca9913210.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 0x1b5912232f6f1fc87b3641af183824e2bd87824a418d7eea8f50b0e8fa9ae45e. 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/DELJ81622184.
Assassin's Creed (feat. Tech N9ne, Token & PASSIONATE MC)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0de0b6b667a7b1e989ad48552c344eae089f390aac1288fb73b74c88545aba. 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/USZEG1800003.
Lights Out (feat. Hopsin, Passionate MC & The Boy Illinois)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd74125efa19ba9d8542ed8442204df4256a7e8b6cd168bf512a17d3576b45e. 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/USZEG1800011.
Assassin's Creed (feat. Tech N9ne, Royce Da 5'9", Token, Chino XL, Planet Asia, PASSIONATE MC & Bronze Nazareth) (Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8e6fd224d0618f3f86f1323ec699a76f15047c079a5e022754dbf189c39bae. 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/USZEG1800366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458560981da25c4b1d4c5fdea27db6440f80a9121dd35a3e2c04fc65673dee6a. 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/US6680918334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbfc16b6fd78c9fb5fa6f85026c30a95beabda248ecc35ec5ca1f7c8a9adef6. 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/TCAFJ2191904.