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 0x42866e0a9ce79e0fad3797d84e3dd7a1c8ddc295c22a987e3668418667fa8490. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bba0032-7a8e-4cc1-93e4-c127abb31ebe.json and https://artists.proofprofile.net/proofs/artist/1bba0032-7a8e-4cc1-93e4-c127abb31ebe.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 0x39458ee772fc88b0249b0815a055163b7742db74bdabd470981c625ae3d00e4d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NZHM19500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3669cb137fa51dcec17c5cdffaf8af6c96d99083c036d4c33e7b736f8b06c91. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NZHM19500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1bedbad646a6cedc96c8a659a30681fab72e262c4471a85723b5b29ecbf9e1. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:33:49Z), 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/NZHM19500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb535d83d7fa4498c9ff2b5933cd1cf8a0bc7d45c0ede67952d37efd99eeae543. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/NZHM19500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f494992123fa1e31d09208aaa750c492c1a09e17b83c8f86e783a081a906852. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:10:37Z), 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/NZHM19500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef3eac117ee7cdc35caba7c986876f14a62f71944b4ad0a5ac2b6faac67b655. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/NZHM10300026.