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 0x1df3764321cd0da2b2cb34ec31de30699bf916b66c36fb857bda9bfd6cdb66dd. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8bc66056-9bc0-4479-b5d6-e7a51331f3dd.json and https://artists.proofprofile.net/proofs/artist/8bc66056-9bc0-4479-b5d6-e7a51331f3dd.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 0x2fc16d86d340745dd80f8e14a13384a517dc83feda6fee6df9e9c7c6d91ba6c3. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZMHN2403941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b1d7c5f8dcf1930907ae73f100704ae70308e5a5d731149778ecb904bc0d05. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:09Z), 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/ITFGO2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d28a37a979b95fffe5c4e4472874a9b32c23624737f4a4f944e520fcbef0d9. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:09:45Z), 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/QZS632592525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c4fef557da83e5b58b5b6586e2b08652b6b8a85aa286bafeed59a0eb8db819. 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/CH6542480980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4237fc1f04a370efdced2ad88c89a8afda46b575984cea5e48ed743db72e05. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH6542480981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee9d124512e1edc108359dea5e41167da99ffca64ba8729d5c50650001b3643. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QMFMF2448672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5ee3fca7f071e05e7082aced3c77cf9a42517090cc9f34c7762aac49b9fe6b. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QM4TW2526074.