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 0x658cddb40e7bf067cfc956da699438691c143d4709bd41d952c9ce726c5d9a39. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98478baa-502a-438d-95bf-7eaf17bdcbfa.json and https://artists.proofprofile.net/proofs/artist/98478baa-502a-438d-95bf-7eaf17bdcbfa.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 0x95d1bf5115d726c64a7cb135eb3327ccb9994b5063fa3306d8beb535e19a65f3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:41:20Z), 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/USA561200876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac4e7d9071e354796c6b52d2e3e6c34e1460f42e8c8b1e32c74420ecfca7930. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:02:01Z), 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/USA561200879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bbc748628b48b6253924c0db835d542168a51fecca7b774908a515313dff3c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA561200880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f0dea48d3f0b68908507c1536357b797a981951cdc1cbe220ec0c4c800531d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA561200883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe508cfbd0a1293150e7238dae63cbf39254060e5e675fecee473051d722703. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA561200886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627fbd43cbfb2077640ced04d42270839caeb31e38da736ed9d5aa07372eaebc. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:04:59Z), 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/USA561200887.