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 0xd6673fd2ac4d3fa06121d9d35f90de5eacae1ffdcebd18dbd2c3ff1f6ed905a0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4336e30-999c-4701-9478-9e9263df82b3.json and https://artists.proofprofile.net/proofs/artist/f4336e30-999c-4701-9478-9e9263df82b3.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 0x2d52a25c341ea1c7bd61dc17ba3595ad294cc37507f6817d4d34ec3164ada410. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/USHM91744794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c40af5107c717bfcd87edeb57820a649d9701dc5e96a586a4a37bb4a8fd8c9. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USHM81869635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c40af5107c717bfcd87edeb57820a649d9701dc5e96a586a4a37bb4a8fd8c9. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USHM81869635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bf770035754ed82835b80ffc0196951b55cb1c16164a71a9787558029e90b9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:06:46Z), 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/USHM82070026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3075a2362a323416ce87a53e09bce0c14ee41367fc033b5f19ecb6815539ed8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USHM82231837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225953044955b4fc66f4189af899de7b79c0bb7c0bf9e950a5172d8738b2ec08. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:08:59Z), 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/USL4R2235820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc35a79f3fd89843519c1398364edc2357bdd030bb1e4f1b85e5157e4ce37f16. 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/USL4R2396741.