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 0xf9382d0148125ad6be8d7f1c020fe46d8a050ce6542227b73615aafc9fa47ac4. 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/982aa059-6a91-406b-9eb0-91f0f808851a.json and https://artists.proofprofile.net/proofs/artist/982aa059-6a91-406b-9eb0-91f0f808851a.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 0xc35fc4fc87076a5d8e368645300b2796e5950d97ff82e67b4a48a56822d43ce6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR10S2169872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e132bf6e420c586da98b0ce894ab502dfff3a18f06603229d2e7250ed8e147. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:18:53Z), 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/FR10S2169874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2e09667f6c5e0ad2de861c1c9df80e39c709b661bfee475b7da3b5b14e7c44. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:25:11Z), 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/DGA072201556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f54b653e2c3a7f1cb7e39b2758ce7e2b817dd14346d1ae547425b1db295f5b5. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:31:50Z), 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/DGA072201557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0131254370a77e67b3e0539d19a28b3388e3504cc5150f057652679bb7e7164f. 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/DGA072201558.