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 0xc47ddd098eeeb345acd8e84e0b70c5da861aeae8beb83b881681248351cf25fa. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/defc6860-511e-45d0-82a4-74edeeb633dc.json and https://artists.proofprofile.net/proofs/artist/defc6860-511e-45d0-82a4-74edeeb633dc.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 0x3ced96193e27f9491eceab02664f8027b5d6eee115253bea5dd82f768f6477b1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BX85Z2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3a23f0a89436bf2a6c862aaa7d20f4b11bb0d99cb6ddd158f0e8622247723b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BX85Z2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe238f2545ae35113ddd7daa8632e549b2441a5303d37be84ce10f2b6e315ac3b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX85Z2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63ee949cdf0846644372ddc84c201df679a8d1e615b26315eae1bf14c4fd925. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BX85Z2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6670aabad8312c13dbf1606c5d1ce1a9f8983aef3ec3daad082ecf15d0c7af9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX85Z2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7e00fd11b5e6b271db720b0ef6792c22d568d78f7154cec72014b1a338ddca. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BX85Z2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa614da6c505fb5de46bfc74a79ae5c36402281c50d6bdee6b521e972c0ea3658. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BX85Z2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627f425089c653509bbc2450ffb8c3c34d280e2e8a6dac7f6d6fa98686eaca02. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX85Z2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb889f63d2d31b9db990e663e79522d477d4dc7379716000fdd54ed478596c1be. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX85Z2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d04210b663c3ebe4922a7e8be06df2f17377382881376883fedbb0831003562. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX85Z2500013.