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 0x97082a94307fd988553aa5d395922fc9dd23a0b8fb4231d05345e1e7ab4f568f. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5b173d2-ddd7-48bf-b689-b8de2422c144.json and https://artists.proofprofile.net/proofs/artist/d5b173d2-ddd7-48bf-b689-b8de2422c144.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 0x20aa9f39889d89c6141fc4f5de02ad608b3f103719c76b9b3ba0470b9c66dfa5. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNJV2547041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327c87bcc1f8ef702f2f132a78bf50e814ff2584c0404570782010aab4ff65a1. 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/QZNJV2547023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf6c67e261170cbddbf6ffeb03051a1521745b4973970052979db63c243e75b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:26:11Z), 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/QZNJV2541489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede8ba5d7c76ad9715711b5b73e5ed703035c8bb02cc2fab1f583da9db878e09. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZNJV2547042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f69aaa513fd5333374341bbaf3ab01c964c142e14c1c1b90ff12c3ab1916b23. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:00:17Z), 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/QZNJV2541564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe816f2cbcd72a60b1eca059fdc3f0935db79b1f1ce0e1e04fab7fcbe792ea82b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJV2541490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa0bb1b1195fc520426c22f99f1dc61c56d73c39e541d512e8d2e62a8156c58. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZNJV2547047.