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 0x75efb89c23752de39299afca338543fb2c2241f507214537226859f2b0eef0ff. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d98a05af-4240-4176-8031-0297b2bd0d40.json and https://artists.proofprofile.net/proofs/artist/d98a05af-4240-4176-8031-0297b2bd0d40.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 0x4a0921d60e7bc0656c26331a894d3b63933b529b35ebc8cebc7cdbcefd01bcc9. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:18:50Z), 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/USDXS1901602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eea4b1cde4e9a65fc975042aec7b91ab8729ae6f08809d82ea94899f2b4b58f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:35:10Z), 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/USDXS1901600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fea61733044d7bf24e17b65232edba2e7a0f3a576322d452419e9ed4676d121. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/USDXS1901597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710c9a63ed435c42ebe252c6c4b7492c52d0a4cf11be7242766a98069b3ee1c8. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:52:37Z), 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/USDXS1901596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b09cf9a5c9d6b954cc58901f9b4bd4fbdc3780590b585ab58389ddad0f98af8. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:28:58Z), 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/USDXS1901593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7314aba6b3860dec1ed82ab6b3dd51420f5abf3a90efe30903e06d1f8a0c159. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USDXS1901651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b34a00d77afca3dbbe32ef754ca53b97aafb5286482ee6b6f70418d7a2bde5. 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/USDXS1901656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e5ad03a9b87d879ed40e62a9d45c0fe392daf053a694ddc7c689fd8dceb205. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USDXS1901659.