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 0xaba8db85798872b11a5f4fb4d7238b6a2dbe1258aa86f108baef1882aacfefb0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4224850b-1cf6-4f98-8853-5f341504ebf1.json and https://artists.proofprofile.net/proofs/artist/4224850b-1cf6-4f98-8853-5f341504ebf1.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 0xd4e694abb7cdd869a192cd7867cfada964794eb1c241cdeafb66ba62b4e551b1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/MXUM72004445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dcb63787e8deb4b469a00362314680432b940020f7d2d84aa75729bd3196e6. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:34:26Z), 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/MXUM72004446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7840a29d07823f46165eccb5b41e63df8a1b7047b385aede16b0eb1d53fcb83. 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/MXUM72004447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d40e5ad8236f23d6483f34dde6b7e3829fd9fbf4e7fbdaad2f5af957c64eb11. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/MXUM72004452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4693ad13bf1328b93bbb29f71f4bf31dc0d1ecd72053a98e1e4cd7a9a6286f7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/MXUM72004453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc3df9032c18555e1c3eb50078d3e7a58791d5712d1a25b147f42b6fdb85566. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:54:52Z), 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/USDS19700223.
Scratch Another Day (Selected Recordings 1980-1981)