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 0x8ee2f8c283e698cd6a10a574ccc5d3870ca5cac5f29de203cb988d3d37d027a3. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc0a8168-7912-450a-84c6-89d39c1def09.json and https://artists.proofprofile.net/proofs/artist/bc0a8168-7912-450a-84c6-89d39c1def09.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 0xc64917a73a04f071b8e16b1496991b14b249938119aec72d15ec30feab343e3f. 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/IDA642203462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9e3bb444417e11666e1982d6a65e2298295bb7c385f8d22688376203f516b9. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/IDA642203463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3006f0116a0687dce3e7f0e2e2a82d3391db29466056eca6fa82d90c2cbf5666. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/IDA642203780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9087aad77b7dcd8ff0123f9a707bef3e093b20e83a0720afa14c01fcbab5fe11. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/IDA642204076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe508b319b49309f8cb625fe769ae9ab52085017652a0b8ad46a36fcde2b3742f. 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/SGB502277379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c66275095e5f84e337fb2f06ee63206c9ea5fa871bcf6c66ac748c2a9add9f7. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:25:00Z), 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/GXD7V2206446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fe0a1af8be50368be7ec0254a1495520eeb18ba0663caec7c407577daa196e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:18:44Z), 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/AEA3A2421034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048b56f075cb7fdcb795c4ba825082d9d4d7f8d6b054ed06f06f294643c63a12. 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/DGA062519819.