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 0x6512b954034075bb4cec2f3e9248044ae1962bae3f1cc91ebfbf72812ccd215d. 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/f756188c-89ad-4aef-8884-41603236f6db.json and https://artists.proofprofile.net/proofs/artist/f756188c-89ad-4aef-8884-41603236f6db.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 0x9b4fb57d9389496eb032f21e4a011e9b47a1515bcb6565f2eae0d78587913b08. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:05:39Z), 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/QZTBF2375544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701b2ce9d27b4e2da88f0af84d5345e2b21d5c62b1e2088bbb5d161446d49017. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:33:12Z), 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/QZTBD2311918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d021030b74fb55a75431b131bb3df1557581ac42025ded3897a2848078a414. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFYX2449533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394ba799ec4125a02dde5b39819e62a6cf328e0c898b25d2c956214ea5bb680b. 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/QZFYX2449534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471dc2b19828fe3ab73b133616838aba3a2ac766516a612aba284f6b6fd1b983. 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/QZFYX2449535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cb8ee91783ec065bcbc0983da9b22f2f005e1d9c1891f55a3c01cc1f65567b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:38:07Z), 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/QZTB82464493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1226bea4c879d512815e0780bfe9696a1b8aa815f987f3c08ee11182ff754044. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTB82464494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87da976f86b9ef20d0241a4b29937545ea98aa95c1660c8e55b152adcd362fe9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZTB82464495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e512c7c3f0309800644db20b60afc58c7a486a87bd0217ba54f22e2f2b316fd. 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/QZTB82464497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae0f32e969f47ec036cf30da43e33f029651654da3f5ce84c9e3ee42dd966f6. 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/QZTB82464500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5c7fa7ab541cb6b72b0552f4b6db3131d2846a4fd983a0e9ef5e168205c7fc. 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/QZTB82464501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe47e0582a62a5ec0f4152f6fdc33d878e237a5a0b41a5c0eff16601353d27f0. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZTB82464503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5404f69c25e4bc6c11d41cc19d52e4471f40664b155748fb4a9e5ea73ffbb9af. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:30:24Z), 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/QZTB82464504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b77ed584b4c7c6a73a315c41080c3b0506d21ba806905a6bd045fe1ed5d49e. 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/QZTB82464507.