From left, clockwise: the movie set of Titanic, the highest-grossing movie in history at the time; Harry Potter and the Philosopher's Stone is published; Comet Hale-Bopp passes by Earth and becomes on
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 0xb2af96bcbb253fde8df348a25792829c782d26445cf410f15df2e6c75e9001f8. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94dcd8ad-f3c6-4b4b-8477-8ad03f936660.json and https://artists.proofprofile.net/proofs/artist/94dcd8ad-f3c6-4b4b-8477-8ad03f936660.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 0x0a355952284d0903305eb0b01323cc77b3520e009d543dcc8a3f4a57950ec245. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:44:45Z), 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/RUA1D2351203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb8cd8999a5187aa9deb3487d4193ab62fdd2adb451bf1e4720d02ec70140e7. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:23:55Z), 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/GB8KE2420595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa32bf70dac00a5aa83ed14d34332904d320a2b57c45e726ba86ce80fef2c11. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2272668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6525bd868d78f527dc47156dacf15410f2a57eb9e8c13f7c7f5aa55b3f1b10b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLRD52302416.