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 0xddd18aae8163555d7ad39730a072ddb87edb1921239a6521a097971f479b8d6f. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d71e3e4d-298f-4e7a-b29c-9d25aa85bbd5.json and https://artists.proofprofile.net/proofs/artist/d71e3e4d-298f-4e7a-b29c-9d25aa85bbd5.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 0x8c19496f384fbb835c06ff4360560e53140b1ec274a13b727fbafc8dd99c2bfb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:17Z), 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/DEA372008335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edc8e5e8ea4b72fe4cc9ed2e5dccb5495a2a42f8de4e4061b84dc6f5eb99c34. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:20:31Z), 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/DEA372008323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb358f3f209490a7a03fd4884d9186407267de6497df07925d65ac8eeea10fd9c. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/DEA372008341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfec9b4afe7cf182db60773373e26ec7a87bfe2ff12771d6b8717c6ed3eda5f. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:03:02Z), 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/DEA372008252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ef558b8a13b997a6bc8b7d0099c3d96f16118fc2896bf7cf4c9678a939c073. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/EEUL32406436.