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 0x214d616c17ab8671292f5f6a55f1be616e80609bd99f06319a1e407acff072c6. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8c540a1-d10a-4a8d-b977-4c74c0ef16c9.json and https://artists.proofprofile.net/proofs/artist/f8c540a1-d10a-4a8d-b977-4c74c0ef16c9.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 0x0231a4242a632c618c7341fccd671ee3a5b1725ccaebd31b6cdb6a5fe5856a13. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZNWU2438637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c395727b77c2150df58674f7d5fd9c9ee6a3e78905e7737366ca06171a5d458. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTBB2439905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb316bf9eeac8ed2cd743287871ae4a03334d69c857aebfceeb21adab47b721cb. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QT3F32491648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126b19d706d6f3c36b72d713a76e75e67226e438864e8a679136618af8b40f71. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTB32541949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1827d305f1bad170e1993c39a3b115eba5d456716421cea4cf309b9e36205e63. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:34:51Z), 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/QZTB32541950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0feb20a2daf50a7b4bade9d45d7e700e5580e86160a85aa0c440dc27add1b982. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTB32541951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ee5846216ba7a9704462ce4f15dde2e635247146660139a87ef404202bec03. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:32:38Z), 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/QZTB32541952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77baee8127dcd07206bf4dfbb169d78a98cfc5483e527c78832de9fd155048a9. 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/QZTB32541953.