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 0x5a2a3402faef7abc3042f4c08ddb1cd6c02b81e8557f9789f62f017a9faa487b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abcda254-c6c8-4b2e-8500-9920ad19f9ce.json and https://artists.proofprofile.net/proofs/artist/abcda254-c6c8-4b2e-8500-9920ad19f9ce.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 0x0c937b6a7358aff9adbc03af87b03bafdd90e74cd78d79d9198ebfd08187ccaf. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:05:30Z), 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/QZFZ62015144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a1641ca8b471923f841b306d75e2ce0501879381aded42dcf2614e1e51893d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:05:52Z), 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/QZHN72007250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b3fb06f7919aab36d71c7d930e64b4e5ab688070454fe9a0c4430cf11369b9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWR2163719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab20daf64f69d32b63d58c1db3b2f87faba4714faa623eecf6b09332738041b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:58:37Z), 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/QZTAW2220304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ab6fadfe5703a88d6a0a2f210997eb9899c41efacf0d3d26f3f4a364ae73da. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/NZPB12300340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc266343b41cdd335ebc93c8e76ca599fb10f7c0a02969bda9c074231b4031c60. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NZPB12302410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a8fc41ca74a805f2b73dfccfe0e58b31caee1cb26fc549004f5c3f579e6f51. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/NZPB12403829.