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 0x3c6a8ecfab1dfe533c6662feef665143001726bc42b7e84689191e611e604daf. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75739eed-0383-4b6b-915a-b3366183e697.json and https://artists.proofprofile.net/proofs/artist/75739eed-0383-4b6b-915a-b3366183e697.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
In A Sea, In A Lake, In A River . . . . . . Or In A Teardrop
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 0x2d11a3bc8354d8b55ce78425f6ad622580b0a07c8846721396b6fa50e2a768d2. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USHK91206301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe547be165ba77253c6cba11faec74ca33e0fc93a0aa94a0f42e067de032a6a29. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:37:34Z), 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/USHK91220301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895aac21efb81a4ef8787c28d6fa66a27b9e573620f260b7b114c3ab37862de3. 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/USHK91220302.
Redefine my pure faith (a tribute to Black Tape For A Blue Girl)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d325f30f70c516a92d66483251c4f8716ac575b4d0d23e9d981c4122d2d6ae. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SEXJI0400505.