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 0x9ee5bd905f3136864e259a9b17eed9d6fd16c2f34c8ce168f672c5d3ac254012. 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/fee70e23-9192-44b9-b43c-c1404fbe3688.json and https://artists.proofprofile.net/proofs/artist/fee70e23-9192-44b9-b43c-c1404fbe3688.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 0x246ce83b3064a7ff4da56682886382d60db49715e1fc492755ead83214576324. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/AREBG2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf2271e56c25aa751ed6f547c219471e756c7563fc1055a54a542f9e2edebb8. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:14:38Z), 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/AREBG2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe720688db30141bb316079f8a9d26a66a2ba428bceebfadb34588cfcfd09e59c. 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/AREBG2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416a026f3c2d0a15e34a40f663fee9e9d6d3991f203f0fd7cb53ef985bffd5b2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ARF862300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58170a7530b914903b7b12270b7e1738c23d9eb268b4972fb5c16dc9b2c639e8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:49:50Z), 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/ARF862400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f9dcb34b77338676243c6e54a3090e5907cd1249cb0ad4eae84be2b964d258. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AREBG2500021.