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 0x0b5cc35c4a17bbdc8844695c51e7f3a5ca06a63ee34d8a034d691b2da9bffc61. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/518b6f7d-436d-4f7d-aef2-8c47605cee16.json and https://artists.proofprofile.net/proofs/artist/518b6f7d-436d-4f7d-aef2-8c47605cee16.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 0x14379968ed38b8ac78010e4ea66b8adc93e6f6de59d697f9e16847e8e7dcf048. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P2222790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8071ed09979f02986bb7b7d805dfd6235c629b747b112fbc4144fdecfce30f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:55:59Z), 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/ZZOPM2241251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2855ab731e92b781756812d0b09d993ce772be40e0fc1aff0a830c2dec3ecbb. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:52Z), 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/US39N2304126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8991446037b810ffc0c23ac3790489f3ed270326af4cb4fd663b048a0a805d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US38Y2311065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a01dc06b3a7fa967b5fc9d7c7cd180569035cb30182726a5ed5ab814d9fab74. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:04Z), 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/US38Y2312003.