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 0x8256f382ac042781d4c31e004c500e4ab7d668bfc36e72a59f55776b80e1d9de. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f157b044-c681-4aaa-af86-b373449f9a11.json and https://artists.proofprofile.net/proofs/artist/f157b044-c681-4aaa-af86-b373449f9a11.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 0x5da188926f25d76e2b00f0d1d64676cb6f19bb5fe9c55fbea5c878c9e830ff1e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SEYOK1930321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea4888d370e8db90181eb28a6fb10dea2d54427c407d1c93d3c2fd548c2f56a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/SEYOK1930322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcf93944d8235fccbcc63df9fbb5354ae77611705d5efbaf0fbc34becf95ec9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SEYOK1930324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dac9c2001b2783e5ab57eff9e32d2537f78c569e012c439dfb063a9d08ff30. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNWQ2402017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d6117f3bc9711aa38ccfdfdb150d3d804349a87cfc940b93a71a9587bf2803. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTAW2429726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe5219e65114cd1dadc37ecae2e3f9c040dba8fd3862f36025c7cec45db3437. 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/QZTAW2429727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe440315c5b9ea943e659e72f187e969ee521111965f5086d15da75251bad9e0a. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZTAW2429729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2588c8ce5a7ff8bb4dc3d1bb9f41c904597469e74b46da428cc7d1a62e82dcd6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:43:59Z), 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/QZTAW2429730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c42651b8b9dc16730545c707f8e1c93deeaff985a2d2e827d0131b804f6cb7d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWR2412686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f5061d0c119e839c3104a4df49d728c94c2b5162ec33a7a08836d5483b67fc. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:06:49Z), 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/QZTAW2429731.