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 0xb8e1cd56e09fc4304afe0104988bd529e87f90cdbb1bcf6b6b6a6cc06c487a9e. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eed9448c-f4f7-4678-9e2b-4da26e472484.json and https://artists.proofprofile.net/proofs/artist/eed9448c-f4f7-4678-9e2b-4da26e472484.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 0x4fe92cdfc174b1e25365b50033c5d34c0ad06207119ac56f40778574515e003b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ES5300407692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3e0a488a1254f06aaefff424334b59f5a30990df1f80f0681a3cd8f7f7c564. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/ES5300407693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f196c1cf03f70bec86f73cbadcb72d0ac0ff6de1df148b087d5c473ebc697d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES5300407697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b9c1e210b4372432c2cc998a778f8218efd67a45b517d43053ae26b4998401. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:55:59Z), 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/ES5300407698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4e02871ddd87b0b47ebd9b19fd6d0a83ed916898e5453015c2eacd371a9aa9. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/ES5300407700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb387efd91c2c4a44e4f2d33dc0dc5fddf3227311639e308f1ca7c43ade78d51. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES5300407701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70afc9eecdfd89b84319527efbde8db7435d934fbac72b5f079603246776fde. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/ES5300407702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1964bb79da3299b8b01d649b5251afd9118a945474e16406085d313df03ac0eb. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ES5271801005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca57d3c5ecf52e66c6d7b3123a9193484176588c82547e40be8b8b3b79f01c4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES5271801007.