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 0x4731aa2a5426c2b50245b35b1f06269611a80a8c76fd5f477762d6d6227f4bd3. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3adf174f-6a0f-4faf-bff7-e97424d5bd6e.json and https://artists.proofprofile.net/proofs/artist/3adf174f-6a0f-4faf-bff7-e97424d5bd6e.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 0x3271df865d6b27c0a7b5cd95758e2819d45c72b22d76ae6dc59cb83f615f3053. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:03:42Z), 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/USHM81803892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa753b344274ca2f629ac141bfe57431400ec73e87c657f7229796308f498c649. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:41:33Z), 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/USHM81803893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff48635cc48007bbe9f08d3e4485bb670b6a4ca14553779b6c8c3344bf646d1. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USHM81803894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3807a9019a8921497ea2e29d76ba0e508a857453aa6a6b017ed5a82ae604a6d6. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USHM81803895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90833253ad11af8c8e95c07e32fc0974148c00d071ceeb50866e67009c64512e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T03:00:47Z), 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/USHM81803896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1024ca9f9727706249cb62fad27e9e79c2dc02c2cb20bb6ab14af57d411ed3c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USHM81803898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4735012ccd50436d23b47ed33131a61b7427c47c8c93c9087c8613688e4c982d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM81803901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cad1d4cab83f70de670a7199415302ea895c9d799a1129633e5cf985bd4a5f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:07:04Z), 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/DER372440801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3168e5e6ccd78080857b12f14c0859966d813a84fb9647abc4d3312efb3afc0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DER372440804.