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 0x8ee7cf917e176fb45e9725d99949c920b652285cf0b17bd9654ef2d777b16b6c. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f561972-d75e-47ac-b2ad-3c94a45494a0.json and https://artists.proofprofile.net/proofs/artist/6f561972-d75e-47ac-b2ad-3c94a45494a0.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 0x75efa7bc8270293fdf1dfe78782c4efafb990b369ac4c112022bb21e2af95139. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/HRA047607674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6e728653455fc7899fa3878d82b6ac5b79c012a3928f105b8bb2001f1e1b24. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:02:37Z), 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/HRA047607680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba9f31c843b3f5ca7496c3539dbfd7714363d921474f4734e343b9d945a93f4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/HRA047507681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547f5be2bf069c0c0accf938c16c7ec9eb7d819236dc85ddc1cb4e99bd35829a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/HRA047507683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299e7260f34f63be0e0cc1c27cee7aa3fbc7284cd8879a5ae0850c7266ab2430. 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/HRA047707684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4da0ecdeb735abf4fe0b9f6aa75f2280579fa11fba20f90aea6eb9ad1f697d5. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:56:42Z), 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/HRA047707679.