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 0x037ea67704773303404a291f4e0c0ec3c8767172de80565fa280278d9ec59e7d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da2abc66-fde8-4dcb-a465-6cea6968982a.json and https://artists.proofprofile.net/proofs/artist/da2abc66-fde8-4dcb-a465-6cea6968982a.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 0x4c506fee8a18d2d3c8e66e7ba8ecb33a27026b41438e8acfd13e01cb5102b236. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMFMF2226426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9fa7f7b1dad4f93dd367d88b602d6f787d1925d955c97cb8fbeb3e01b01349. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QM6N22355523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cdf841818b736ac2070b60f0e7b1f6da473c30b296041434559887995daac6. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:00:23Z), 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/QM7282372161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47b4dcc9c94e537c711371df172d7b5ccd5846aba961f9e2efe5b714499a706. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QM4TX2349591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8416d33794f9ae6921201dd68697c8abbfe566b10595be1434661a35871c87. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM7282372093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32096ba67a2259d94ea3d04678eaf14915e3c4b65dda968d8aae47a17d16a55a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:09:18Z), 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/QZNWX2280778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4d90ea0628fdce56e96b29978d827bc8ce3833c49f2ad2f0b87ae62585c75d. 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/QMFMF2304534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c9e7339772458edfdd1c9b4a189f3a1ae9e44bd8b97f050d1ae650cdb3e1b8. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:43:45Z), 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/QM4TX2479811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcb43d96bdcab881db5f2bc42f44a575b5ca19a74878371faa1d7e3e0a7980f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMFME2546260.