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 0x3992753d1f565352a228a086e62f792604dd291bda2bf8b430469a4b8e9652b3. 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/5d0e35f4-1413-40bc-9f6a-5ca9463ea1b5.json and https://artists.proofprofile.net/proofs/artist/5d0e35f4-1413-40bc-9f6a-5ca9463ea1b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lempicka (Original Broadway Cast Recording)
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 0xfac03cca7320edf4fcdcace43dfff11e27018864860d1fcce7c8914751970d2d. 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/USQX92401786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dcedd2f8eca6c8ffe5718bbe43dcb2f6ebb41f50a798da964c8c16c73268e2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USQX92401790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbba269dc7722a54bcbb4bc9b80f6e35a05fb9965ef4164f3b5635ff6c74857. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USQX92401794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470d1593fefbacdc8ab5aea26ec966788497e4d9b15565b5336654ae4067e352. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:45:28Z), 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/USQX92401795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f858bd20f1bd07647f87898df9e3dddc76c781b2980e8da3ac1eee85a4a4e9b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USQX92401800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a30e92e1486af2aaa1f3c18f214128b4f400d4f0747cda664bdb2d6504bd82. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USQX92401801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd96d554b3c0e78624ad8c47afe034af08037a357ac2258f9b7789204db5535c. 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/USQX92401802.