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 0x75972cb00bb1ec9262e397db17bf1c76940f9764ed83bb8d467117867590b374. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a62284f5-b2be-45dd-b34e-8dc5c71fc5ee.json and https://artists.proofprofile.net/proofs/artist/a62284f5-b2be-45dd-b34e-8dc5c71fc5ee.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 0x26d9ad75d99ea44a54ca7a82198730daf73dc89ca29f90db978e3fae119f5ae1. 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/QZNMN2250052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1286b056eea70cc83bebab8296febfa866d7d7c952708ca34876551784e859. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNMN2250053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f5d1aeaab0cdd1c23f12ed2feba849272beadb36775b33bb3403472fc9170e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:03:15Z), 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/QZNMN2250055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa4df11a25d62a49c195a802d55e107ab1e8e8e88c1bb21ae0921c71c291e6c. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZNMN2250056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2df470f05bae10f2c3b40c03dd867d5dde70727cc18d6558c710c0e6252c30a. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:23:28Z), 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/QZNMN2250058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af463d62e74b925666606c5f92b796932d3062dda7b0c9a171164a93adad520. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:55:17Z), 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/QZNMN2250059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0be7992d02cc44fafde1513e9061a466c83e44e4a5dd9fc79f7573207d06836. 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/QZNMN2250060.