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 0x2c981858f0da08565df25060d139d836357d2ce9c58d800ce7544263f295a795. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8849d480-bca0-448e-8864-8fdb2a14e899.json and https://artists.proofprofile.net/proofs/artist/8849d480-bca0-448e-8864-8fdb2a14e899.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 0xa1fc880193048d4c2123bc4b229929ac1b24cf8af0faeb103300f5e873d9da00. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTAW2387333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fc544c201224ee234b14408ede15951d9807f8dfc29c63a8c3c9a5c1485ebf. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZTAX2324928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737030475afbc4d50b1a2c18e48f90d386c867b9f3d467aa941e98755ca32838. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAZ2369282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe164e7a35ea3148e379f2d33c8f387949790eda1afb2f3eb37e57a2b3ca1897d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:12:13Z), 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/QZTB22393530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192799acd77a20d05c6c2f879c969cbe093915d4e1058ed3985dbc925c298bac. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFK2308985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6def9d04178c7543b0de08362ec1806ab1ae79ed14cc075fd176834def4c902d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZWFM2397038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b65f9db2ba2df4bca4f76df03144a63f9b8c4892b4d07e539025d5f84f7ce1b. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:01:51Z), 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/QZWFS2312925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b438ba9d6c4011175c382a9bdfe6bdcdb210d58850eee55a0ce85bb6f4def5f. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZDA52428174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb4c836a7abde41ab63ae9266cd452f265d4e3fadafa369bff9e022d7eaf219. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZNWR2492263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f8ea0d1b4fb728bebd7c46396e602725113206cf68ccef61662ebbc6d358e3. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZNWS2418453.