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 0xb568ebdc479f11f17cb51a329437b995882e1c054e3c5ffd4a98d379fe4b75cc. 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/5b5ed71f-6295-49e8-ad29-40946844a21b.json and https://artists.proofprofile.net/proofs/artist/5b5ed71f-6295-49e8-ad29-40946844a21b.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 0xf7b8126c182020e27c315844caa7f1ab8d3feacfc3b355c0d7ff0b0dc0436cfd. 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/US2S71671007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f992dc5c641e5833d4119a2dc8eaa9ccf40eb7b0900a09dc0a083feb5a8bfc. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:14:04Z), 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/US2S71671008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8241c8094e1b5e07bf6956f1a553869b55e9ea3d4b269b2e9aa4269b56c807. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/US2S71671010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1bedd08483202ae209b3107d3c66752af94736f298c8895e54ec516cc771e2. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/US2S71671011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28c805b93e3ebd76ab2166793bd4f28e4671018fb9a149e6f27447f01eba68e. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/US2S72024002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374ffe4a5a5f247ab1179d58a2dfb234e5da6db988de94b6717efb0b128e779c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US2S72024005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1895fa1a17ef8b224dd37c06553c8277c78907ef782196e7d4c839fce9caf86. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:10:49Z), 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/US2S72024008.