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 0x74d912c689abe3c102a9bc923538c52b5e99b16291161ce98ec9a51f5dcc093a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1237710-b941-4d29-b6e0-d6153fa6003b.json and https://artists.proofprofile.net/proofs/artist/c1237710-b941-4d29-b6e0-d6153fa6003b.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 0xf2a684a5b3e9f5aebd6b5733708129c88b1a2cb2191697ae06c6c3bb8dfcebc2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:43:43Z), 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/QZTPX2290271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94260c0864220275c0c9533f0705e04c37cecba66f271e395b53fbb9c6f6798. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTPX2245885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa283e835001a9ba0b12bc630228d31447408a8cb00d670230d3305d3fac67aa1. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:04:02Z), 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/QZTPX2245944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f68c019b68f0bd170196a4f773940b72675f92bbb2a63854e0819cfcef30238. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:08:26Z), 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/QZTPX2293980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689c1eace40baad5da6f6d88fb4754695a3005a114d91f447feac7f31290355c. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZTPX2293911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aadb288f243de5e8f9390fe576a3e10ed6a549c13573c9d6c998cbb6083a442. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTPX2293901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ed3b24b3f5666dd49baf63ea3469444974d0e21c875141f2cbb5947adfc8a7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTPX2483783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0599a42877de852be6dcbd4a9f27333a503ead06e1c2dfc36f0c6a63edff74e2. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZTPX2483758.