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 0xef420702fcba7ee9454ebf90905b39cbe78d6ee734d5a82e9aec7cc16f2394e5. Chain 2 (Bitcoin): anchored in block 953662 (2026-06-14T17:28:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/561a3b5f-bf0e-4e6f-899c-06d66615c22a.json and https://artists.proofprofile.net/proofs/artist/561a3b5f-bf0e-4e6f-899c-06d66615c22a.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 0xd1a94fe460aa76719e956df10ad736937c9dff2364b332bf04398d0deebdef2b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/JPB602057915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9714f8b62ecb412137d96b41b508ad56f56ba224c050864d767b3c63e6deb279. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:46:40Z), 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/JPB602057916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849fde56cfdefc4e9407f51bf80bd87c38df578db6cb2d63a2fdb49299e957cf. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:23:50Z), 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/JPB602057917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd6e597ace0082675000ef8c959ef199e5fa222ef1c43c8d2b95ee78189cf68. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:17:47Z), 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/JPB602057918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a97fb656c858e954f0572d2a901978e5b876f9bf6795d106cdfe521d8945ed2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPB602057919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b1ea2adfff5241e2d2f8fcef624e942986b8a100dcc91d006e002978481b3d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPB602057921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92bcd98dc9841b7c626c3eba5f351f68a51f87a15f5fa661c4035bae580ecba. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:24:08Z), 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/JPB602057922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cc91df7f21e08c95c3d0dafce45e2abeecb367a9c70cd6cc540574e01350da. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:27:58Z), 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/JPB602057923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4003863128e07417a580fd23c13af213d6e45a7b513caf20057830673d7759a. 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/JPB602057924.