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 0x069cde75fef982d29c925a4fd4f1ef02ce69c594565abe310cdff69792e20b4c. 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/75897d9d-424c-48f1-83d1-23452a6c2547.json and https://artists.proofprofile.net/proofs/artist/75897d9d-424c-48f1-83d1-23452a6c2547.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 0xef3eed2105620b30018ec3132964ff447d3e9edfcd01f5ec42ab3475986670d9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCABL1362080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718c8329d6e1c231d75a4866f3c3ce90063faf385caa58870504f1bfcfe6aba4. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/USHM82158784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48434544be8c774556bb84cf5a9e276435c542ef4f50bd38c97633fa211cec82. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:21:09Z), 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/TCAIW2404723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d0d1beffc57fe605f81e12cef40b5369e8e6cab1d5952490d49cd81d6252f1. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAIZ2418468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48434544be8c774556bb84cf5a9e276435c542ef4f50bd38c97633fa211cec82. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/TCAIW2404723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d0d1beffc57fe605f81e12cef40b5369e8e6cab1d5952490d49cd81d6252f1. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:32:47Z), 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/TCAIZ2418468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1337a99c790bdf211933beb80c8ef902f22b5835874e51f1cc8d7f253e8aec6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USDY42536432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2c64e5028fb7b13eae3e3a3b0cb26c717f98cd3ff0801af553b4d1370af3a1. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:11:52Z), 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/USCGH2548565.