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 0xb7fe7fd85bcf2329090d67096f5702fb6b997826ef2f99e0cda90df67f147b4c. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90986c85-6bb7-44f2-95ff-388c9d6d68e2.json and https://artists.proofprofile.net/proofs/artist/90986c85-6bb7-44f2-95ff-388c9d6d68e2.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 0xd97763a4816e93dcf4fd1c14175388cd71ed41f28b075020d1585909ec6fd86f. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:01:12Z), 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/USCGH0581716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b22da77a0682366889ce1dd13d6509d0d4094e9bd9db3b1e19f861d96ad26b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:05:53Z), 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/USHM20796522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b11c228edc639e0d93d7787d880b7ecefa2d5070dcb9f9917f0e84174f6471. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:27:44Z), 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/USHM20796524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebaff123d9a3597b89a2f5f5b542121d34e80f464ce1df8b0f2c9a8e30d778f6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:23:18Z), 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/USHM20796525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492e0bf168788435ee8e43761b14770fb9a6d4ea9242b1ca8e01a7442f6c8c39. 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/USHM20796526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c55529923e6bc69b9051269aaf172a59c48f52b1f0a98aff9430c8b56df2ac. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:20:11Z), 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/USHM20796529.