thumb|King Jie of Xia holding a Ji polearm and sitting on two ladies. thumb|Killing No Murder, cover page, 18th century reprint of 17th century English pamphlet written to inspire and make righteous t
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 0x894c9413281b779cc8b941d0b3fad82a39f380332007e41137c68d90f8822a2e. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f42930c3-618b-4e97-97b2-abeb42cb3944.json and https://artists.proofprofile.net/proofs/artist/f42930c3-618b-4e97-97b2-abeb42cb3944.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 0x95ad601113c0d11f710aa7d55ca087f93891a8e2fe8298ba3f41368b35c7cbc8. 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/SE62M2281206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdf7abd7b8303d85c1facdbcead388a0e210d8a8e5ab02e84ac4662fb5b0324. 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/SE62M2281207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f91f54ca2c4ffec455813213623e95f620b43ea61f4853e187288e96bc4cb56. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:08:42Z), 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/SE62M2281208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199655e40ab4f7619c9392f957983e94eac563e19b60561bcf7e3d6d896a963b. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:01:39Z), 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/SE62M2281209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87e7225863715eb8b51ce3f8ab8391e453743805bd0f5a0eb5586a00dbba663. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:03:16Z), 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/SE62M2281210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c89daf7e1a96354c94c6b2ac55358b5eaee5d3219c28dbf7f4629f8d188d4a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE62M2281212.