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 0x7230485290193cf6356192a5c1187c23a1eff68c42f236a365f4332df2a5ac7c. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d074e794-de48-4ca0-b56f-47714c7f7537.json and https://artists.proofprofile.net/proofs/artist/d074e794-de48-4ca0-b56f-47714c7f7537.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 0xb91a1cd2dc2f079e43699ab96cd09dc14d04b4e177f263f2e0b17bc0592e0205. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:40:42Z), 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/BK4DA2323483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4240b680a0a5b0ac18114d4106e65b8a919f9896ba02f0bc0048d3d8f0c73b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:00:12Z), 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/BK4DA2323486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407a05e89c5cae40a7216c58ebcd73881c0f8b0e284e1fdf475ec540abeaba5c. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/BK4DA2323485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40faffbbf222941baaa6eb6ee13de8fff286d399cadca1a95da24fcb13998f9. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/BK4DA2323484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02b60549846bb10992ee38318f46bb15f1d454f80b8bfb56bc16f5b73b19e3d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:31:58Z), 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/BK4DA2323487.