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 0xeb4db9799354c091f784ce5c8556b6cf1b21390cbf0afcda0f86240253df72f3. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d6fff88-797b-48e0-ba98-365b89c22c48.json and https://artists.proofprofile.net/proofs/artist/6d6fff88-797b-48e0-ba98-365b89c22c48.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 0xd4e5518dffb4dc159a3e7a58744ef755690e85fe3a4402be5a988aa5ff93c0ac. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBF2382519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ac0a58dc8389c654fdd0fc7810710b177bbed7b72bef3fbc2f874ffc802dbf. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:50:42Z), 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/QZTB32447625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb278227e542f0cbcec6450b7664aea376f44172acd9ef470ed493a2c97e203fc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:57:26Z), 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/QZES82539721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba870f402614f700b288a6661cf3051b34cecc55492e6041f2d2fe1f7915115c. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZK6K2564079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d251f2df12c468eebdad80fd9ce59c74380f5dcd175d1d3b0320226f38da4ca. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTB62559008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e73bc49e4c5b82ef8081fda2cd969990ed9076a2d466895219928c12b07518b. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:33:43Z), 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/QZWFX2517356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bdf0449bfeb08f3ff4a13a4d0a7f53a37377c33f1fc563e59b43dce2e52139. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZZ7S2496608.