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 0xc8817525deda7a3fdfb1fbd71c205ae42e76367d55718fabf76ffee648404128. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eddc02ba-37cc-43d7-ada8-63fcdcfdc25d.json and https://artists.proofprofile.net/proofs/artist/eddc02ba-37cc-43d7-ada8-63fcdcfdc25d.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 0xfbc513b27a6587c2fa676da99ea67b23205657bb8ef6d863fe015110f52b32e9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USA2P2316581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945016f0ac2ce03973d254278c2f64b715b7e8468eed78b1353a4997a4767944. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:02:43Z), 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/USA2P2333606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e426604a8448da8b08f041674aa834f6c2059e2e4979f3a0892a690bd6a3d82. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA2P2333989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf523658f6204fe944e3d7f3d3241cfc6237e5c96f18bb024573005d49ede13d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USA2P2335001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19add7141f9258eeee9a473b4a7e2dd8c031fffaaade8c32f896579dce8b0be8. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USA2P2335928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74215c2f3a65ede93ccb31f263ed8d63d2cef9409eabc7ab6dae1a1fe2e2a9c0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USA2P2337169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17eee055bb45fb51742d6ec70c22291a25262b2c0a092eb17d401a837a60420. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T11:03:10Z), 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/USA2P2343811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca6fcccdbdbe16e8b5b9d205ad98266413c7ee3be775d836a986dd475d91082. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USA2P2346724.