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 0xd62a4e87b0290dcb8183bc9f25b5d1483c168f3b326c2366a23a2bcd3b74f4fc. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7d6cffb-91aa-4444-b227-738226caab10.json and https://artists.proofprofile.net/proofs/artist/f7d6cffb-91aa-4444-b227-738226caab10.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 0xb6ccf246a421e8b7fea6706c94e2a0dad3a42721c4bc96cf8d60edbfeb1aa2bc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNMV2286007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44faf589c0d53dea2f511431c67bf921770bd34c8f737e2b8ffeb3fc0d701fe5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:50:21Z), 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/QZNMX2218540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc219bc16aa9540d36826c1620c0d3b0168f12a34034291e8fad4903b609e9c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNMY2290712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc824d98a5ef1a055bf717d0518b0ed0dd715338ef19a4905a76b31dbb5548904. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNMZ2225411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7750089d1931bfeb39cf11d4a5d26ba0e272c975ec7fe7fb44142890cfb0600d. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:32:34Z), 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/QZJG52387365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c19f7afc395b007907742ccbb7fdf02b1412959d9801b2da75842cade9bb09. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZLL92372020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4704ea4a5db728fc76b9202b398cad6dc41875377035d0759950d841f0cae5a. 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/QZNMZ2316981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37373b1339121862dc7f4f7cf85b465210aee40b85bf8a79ab897646900c49aa. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZJG52408671.