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 0x35eb9a3e6359caf8f7149d410bf51c2ec8d3fb68ff3b8eaf55c47e6c60bcb27a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40159512-4953-461c-9569-745d5510a856.json and https://artists.proofprofile.net/proofs/artist/40159512-4953-461c-9569-745d5510a856.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 0xa6ed4f532ece758691cf29b91c6e2122e13c4df97102554f80d0eaebc700ebd2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:51:54Z), 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/BX1091900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8bed0fefc30656a1a150b7febc4985030a9b209c58f0aa2cefd94cb79088de. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BX1092000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab48e61c65e42555192e0b7b22781ff551945f82b83bb426ca18c5a97b165c5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:05:29Z), 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/BX44O2301900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3b3708fdeb534ee9f123d9bff5c7211b12e8dbf39092f414a31642b8ff8dbc. 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/BX44O2400581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa301eb51fd328f34cdacc52dc39e6d35be5642c7a58880730da654735f1e3ac8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BX44O2302082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50aaea3addee1b4fe40e4c8a23fe7cf600c9f9f2b1b243bd55ff00a37940feaa. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/BX44O2500335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4670fde0545860e928273a17dda00e76d73318a039368745699ccfe9811186. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:29:31Z), 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/BX44O2500339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa949246da58631ad27103729ca55a2b595962c743f83c7774dd37fd7e638ffc1. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:41:19Z), 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/BX44O2500750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b73cc19836a3f0d22abedd5dd159e23439bf4be7e75ac87aa0cf659a5ea5dbf. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/BX44O2500341.