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 0x562c838d5635f3f6855006a561f2f4c13576983a4a40d1f10f7094fb47e5d9b1. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/893fad8c-bfea-41fe-9a47-7253d17fd284.json and https://artists.proofprofile.net/proofs/artist/893fad8c-bfea-41fe-9a47-7253d17fd284.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 0x21925d7ba949a2efc4f9c4c3afb1e90e244e03326ff83b5f6a8e2ca5c7e9932a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX3Q92531014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80756699e450ee2316f3e6a782af837abd2c7a244489154c85dac68f58dc91d1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:51:44Z), 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/GX3Q92531016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6039ab661e0add6da973408b9a52c3fffd6138da49bafc57e4a7077b28e20444. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:56:07Z), 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/GX3Q92531018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1febe03f762da911d2982b6f2a41ad62d6dae3167d857fcfa8e3adfb666d16a2. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/GX3Q92531019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5897c7aa283ceebf8039cce6e9bc550baff304f162872607501ca31287b396fb. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:01:10Z), 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/GX3Q92531020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999c13156d70eb301bbad4549b7aad4cead69482e3d5fc7b72e8cf461e614638. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/GX3Q92531021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9b9c92f02f3fce2158e8740cfebb5d0e343111ad05b3093c8a7e5724866c6b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX3Q92531022.