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 0x78c8f79f9b9985254489ed93e23bf3f3cca1cbb5ea19a2444899775dbe538cb0. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/884e85e5-9197-4f5f-81d8-645391476718.json and https://artists.proofprofile.net/proofs/artist/884e85e5-9197-4f5f-81d8-645391476718.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 0x77f3f99fa482979f2e5720b49a5daab321188b01be4b1fbb3ba5f456bac36403. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZ22B1901475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78364de8bfa5ac8ec61201fe31ca4e6f5f0779ab18f02c8206ddd119bf64250. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:54:54Z), 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/QZ22B1901476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2937661846edf1838e6fbff569dc59fede318c2fa1bc8a594b28949be95999. 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/QZ22B1901479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef39f6389fbc92e7df2393be1dd41e097a58bc2a272beec929f133dbedf571b4. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:47:42Z), 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/QZPJ32316771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf13c0214067e3a74fe2a898ddcc6f442f11e3150a37178294d1056204a7261. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPJ32410540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3d0834f6fbeb43e575aaf8483612353a7eb7480f1ddf6cb6594c980e3e5e84. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPJ32420982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd15e7427abf463a8076dc91d8d5a4f16507492fcd47d52461b4b222b9b03d32. 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/QZPJ32454152.