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 0xcac31bda3b1820984a2de9dc76524a388460a85641eeb69d4614b83d57bb8a52. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f5eda23-a310-4f02-b419-b4bcdad66fd4.json and https://artists.proofprofile.net/proofs/artist/0f5eda23-a310-4f02-b419-b4bcdad66fd4.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 0xd8db6500539a21b6661cfe4c52226bcb7d86a71151963c01e8e94eed378a5ab4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:45:17Z), 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/DGA062282946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53350b5dd87268d6549ed5916d7b6782f46f8dfde31671f1de504068e41cbbd8. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:27:42Z), 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/DGA062282949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8240940dd98e7bbdf1bcc4f3eb4b3bc1a94bec1ac33c516a32ed6e60e4b7dd7c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ARAE52500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc4d436cdf90d20347fac0f5a95771486fdd65384bc8d902dc3824ad142bcd3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ARAE52400148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703956f1c88a50fbf1bbfe56644fc5b60a277f12cad39abcb810d18e184ad986. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ARAE52500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43471798ac3fb94c5cd41b44d599b4f062292c7de5e0ab698104d467793226d2. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:58:03Z), 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/ARAE52500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd604cf264792f3188412f972aa9ffd5c4068e2640d79008526114459967a19a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ARAE52500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac0eb5e7dbef038a5fbc55b2d6202d5c49d86e7862cf31146dbf9b14ba8bfcc. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:33:56Z), 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/ARAE52500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd503c39ce5013334e87e98499e71bc99953cccbafe24f16ec83196be9a255ceb. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/ARAE52500114.