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 0x7c4498dc96aedaa84bafc32707e7f89c014c3e358a8fb494abf5ba8b6c7e5a78. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2db2557e-2e31-468a-bf9d-7e49f6159251.json and https://artists.proofprofile.net/proofs/artist/2db2557e-2e31-468a-bf9d-7e49f6159251.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 0x6582a1f6f11a4929103400eb8020af463a4fa54fe5b8b8816190b12c50558d87. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMBZ91973948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cfcf231ad59c52fde97622391a2cf769524c34afb08f7ffad8dd814627a638. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:51:28Z), 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/QMBZ91973949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023da774d1493a383eb40e837eeef21034bc20b3033e5f2f96a4bd9614df6c98. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:45:59Z), 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/QMBZ91973950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00d24a091e31347ac43020db8b6b1803e28be7a20e5bb7a808efb417524c12c. 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/QMBZ91973955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb92587b607d50f534c836d5419cf94f24314f400bed56485733fb7abec5484. 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/ES5301764835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07697ae3b84211865cc50c8706bd755965a7d9c2b231ce4d6617f9486826f9a9. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/ES20D2000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659c53375bce217011269de45d8ce562be367a619348b069697a89ed35bb6b5b. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:55:35Z), 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/ES20D2000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fff3399d1e9b8e3a79247abaeef4c17c6fd91467c9ef3fe51a154e8cfccd7fd. 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/QMBZ91947724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e94076f7877a40f102aa17223a0973d13589a77e8948687b012a51cfc534edc. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ES31E2515799.