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 0x85a84c94e050cbaff7b8103ca09bfbf8907f3a23bb21e72db714648eb56022a1. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97b21004-e783-4df8-abe3-83f4f296cc50.json and https://artists.proofprofile.net/proofs/artist/97b21004-e783-4df8-abe3-83f4f296cc50.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fight Fire: The Complete Recordings 1964-1967
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 0x4e18f166e9b717d5ae25ee34c2a86344d06fd61f5b47ab502d9f82e0c0a0e131. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USC4R1402912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75425cd62631cf3218eabd92465979b930b480380d81779925071012f589d4dc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USC4R1402913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2a6e693adb3c1d9a36d8962ef629825c6e855de503b16bfb0528fb8de3d011. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USC4R1402914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b9bfafdcfe02788df7845002341f264ef5e67e7ff85eacdfe02308c0a731a1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:24:11Z), 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/USC4R1402918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b26e8d27c022bfd57d55c56f6c546da0fa56a9a5314aac207499883704c097. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:27:52Z), 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/USC4R1402922.