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 0xbb992090b65f31fabf0da69269ac3aafebeef7f7d5691cf5951c009778e95f4f. 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/d2a7f5e5-c369-41db-a9e1-c9d2ee5b5743.json and https://artists.proofprofile.net/proofs/artist/d2a7f5e5-c369-41db-a9e1-c9d2ee5b5743.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 0x8e78907e934fceb0c78054e439333ce392eb952867e79426d5b6340c957b0faa. 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/GBKPL1816834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848d52ea49d230d3306ab2b1f8c0791936d2984827bb541bf27a650621c282de. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:52:44Z), 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/GBKPL1816843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843a88788a581165123a1d59458f7d08ce299a9c0e77f601c433ab896db8d72c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:43:47Z), 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/GBKPL1816847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07f254f5d68374526e6ea22a0cc672a88631ea7f092c6028b1e006f78335e3c. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:36:18Z), 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/TTA572300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28fb60a97aafd486ef6d9bd6d29f8dd6876d05db24d4c244e57b013ae9eecc4. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TTA572400024.