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 0x14c27f4dc9ed970a05a3ed62c6e4677c673f1b005d585c33a820ac8a3d5e1829. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e33531f-70da-431f-9f7b-80f9cc99d8a4.json and https://artists.proofprofile.net/proofs/artist/6e33531f-70da-431f-9f7b-80f9cc99d8a4.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 0x04661e5a4ae73df96e402ae8692e670588c69eb1de1416d4da086767be9c3c22. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:14:45Z), 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/GBSMU7421400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01fa061fca2af0b2b3bf7fcad67569d35fa49f2239ec4c009aeb6bf9b162d6d. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/GBSMU7421401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddac7ec1e80a8c1687ee96390c55d4a2574d83ecc8a1bb97f405966688baf88. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBSMU7421402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e1b1683a16eecd76e5d0ec6903115c5cd1da6cef2cdb8f30568b464cc9f31f. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/GBSMU7421403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a6d3726dde3c8a099e446fce57dfe5a6ed8476249db17d6cdf076737fccebb. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/GBSMU7421405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa42e2132600a581378896fc3aca78bbfc35c405a45c33d0b0615d5a288dc72. 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/GBSMU7421406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9ddf9448918addec2b9816daa9c6731fac19bb1c6cfd5698ddccddd7c25e20. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/GBSMU7421407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d5160265b4ba18caa92c99418ffebe91be4a9f2f44b7d0b5cf6db86eda9154. 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/GBSMU7421408.