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 0x0d36ff9f50019b2b00887f6c833829d4e3c671c1bcdc8d61ee600bb6a37ba17c. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f77f46fd-5b73-42db-ae3d-ed9302536b8b.json and https://artists.proofprofile.net/proofs/artist/f77f46fd-5b73-42db-ae3d-ed9302536b8b.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 0xe09781dd168e58f672eae8638b156d1c9825ce940919a7a2c9ea03f90cef3dcb. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:58:05Z), 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/AEA142009805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e73f990ffbcf675840f0dd68963efde0ad92ff86a8f40c4d4e5fcf233e8afb. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/AEA142009806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecbde20fab90eba375a79cb3d0f9737e3ce6d03889d5b1332387e29f37793f1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:06:26Z), 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/AEA142009808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e7fa9fc57e97e7c43db876a188daa5d8777cba02e5b9562bab10ee0bc33617. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:31:44Z), 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/AEA142009822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035005ebdb1e9bfa860a814d6c2b8e01e1dd247484649510987330448cbac71b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:02:40Z), 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/AEA142009840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9648b44b5948bd99009849604aff5d8b33638e70060d8d204485304a2a0ff31b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AEA142009859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4af82cfb43cced70dd4aa0f312b312e8009ca230f8af933a3993610ef18a36. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AEA142009860.