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 0xa28befea9a7f9cfd4b96ea4686a8344aec1c5ed9c56f881365eb1909f7d3905b. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28b18919-6981-4b91-8d17-9e23b3fcccf7.json and https://artists.proofprofile.net/proofs/artist/28b18919-6981-4b91-8d17-9e23b3fcccf7.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 0x6e0c198173b60887d5eaf7776bae73f2893875061bf855b8073453c8d2e7843f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:40:25Z), 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/ES5770608842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef033a9d3dcb30444b252e2aefc63f11658eb6645a8e51bb2fa2fe56fdf94a6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:23:25Z), 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/ES5770608844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c36e6f717ab9602b5b9509a4818db70baf7b856c588d4927f500bfd2058088. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES5770608840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dddf8e6fd4da78fd7a8362151dc5a0241fea71a69384899c4a7c7a689b5b1a7. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:52:07Z), 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/ES5770608914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d2dc05f6a67e93dd8e3655b791ce700ec09b0c6877f2240352dedac96a47f9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES5770609015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d2dc05f6a67e93dd8e3655b791ce700ec09b0c6877f2240352dedac96a47f9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES5770609015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed10bf8fe741242fc839c9f50b79da22d967218dda97589a63660d52836dbf9. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ES5770609136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa56245d340379273b55effb056af14700bfc626b4d9d9e0e89385eb832bf3c5. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:19:30Z), 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/ES5770609350.