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 0x282a8ff3b699f3dfafefabc005d76b40d45c4666ecba6e285a02f57cf7f383f9. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a914665-a0c3-4cc3-b50a-3c9f3969b46e.json and https://artists.proofprofile.net/proofs/artist/2a914665-a0c3-4cc3-b50a-3c9f3969b46e.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 0xc7ff28e6ad9352823e6d08353d99729b6b4df92bd85b2b6e6ca598f9b8e52eed. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/AUMXZ2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd991d252df4486929a108e7acea1344b4cf4cdd50df302cf57c7f1ad01f15764. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AUMXZ2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd09883f53e5ac40aee678b36246262e25383d208a1b755fc30f0df007ad2d3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/AUMXZ2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97ef66f0803751773dca0fc5f5064bc86cdb430c4fee6689e0739b547c7e588. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AUMXZ2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd09883f53e5ac40aee678b36246262e25383d208a1b755fc30f0df007ad2d3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AUMXZ2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97ef66f0803751773dca0fc5f5064bc86cdb430c4fee6689e0739b547c7e588. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/AUMXZ2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd991d252df4486929a108e7acea1344b4cf4cdd50df302cf57c7f1ad01f15764. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/AUMXZ2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ff28e6ad9352823e6d08353d99729b6b4df92bd85b2b6e6ca598f9b8e52eed. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:05:49Z), 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/AUMXZ2000002.