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 0xa662f44f7d81f6472bfe8c2acfdb0c95b1d945e14c3e14fa2c6d89cbcbb392af. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2bb8f82-fef3-469f-b882-6d12add7e711.json and https://artists.proofprofile.net/proofs/artist/c2bb8f82-fef3-469f-b882-6d12add7e711.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 0x9133bf99587fcb6312a5a086b0c3b28eb281893d2ae02c2f9b82d9dfcf3fddfc. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:12:04Z), 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/GBLV61905324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfd227b6855d1363e2d45505f1673d6a3b628cbef75a51e8d2d4883c3886064. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWW2218394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f1f5605aacac5c6c95fe59b6e3dd56e5bd867245fae794db2e288473f96db9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:24Z), 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/USA2P2358201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26ee498abacb95cf9b3cedc79bd69c92d7bd0eac1e65df6d337aea1c3f7c4df. 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/QZDA42472466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3bf4d09c090aee4b20036d07f5e023cc73f1a2437be051beb355ddefc257a0. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZHN82471260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e62790e4cf24cac9e1d2f36605d92e70b25ff23f273b11f771b8b9464b540b0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZS672401832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae4357c6c16f07cabe47b814671005464793646c5ded6bc035e6b07e1d08230. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB52587002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1116651a86ee7b551ec0cad392c05d9a931604341fe40ec606e9afe739a53ccf. 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/QT3F22516630.