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 0x01078484a6936215578e8a0550a95f2d01c8054a9d531f45e7f279f87951a29b. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/910ba2ad-443f-45c8-9051-9c4afc0dffee.json and https://artists.proofprofile.net/proofs/artist/910ba2ad-443f-45c8-9051-9c4afc0dffee.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 0x4342721f2929f229d30af0194465ae7c80b8a7b7b7ebaa8a4b9c97e747037f89. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/GXD7V2272261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30b79a7c4cce7835d8bfb17cecf2058dcbccfdc18641268e3efe75da5f759be. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/SGW502282164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dcb007090bfa51963f3b842d9b61129aeb814a843316c8cbbb5321b88e32be. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:01:40Z), 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/GXD7G2548458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1021de3468428f3517b13ec9e407911b96073777dc7d6eb0e79735716722dc5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SGW502560513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cfcdd1c67fe270f28eea524d3b5a34e6d127bfe6b8051bb27592c3f0c94d85. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:33:08Z), 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/AEA3A2170277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc22e7311b7e33d161583877ddb146c5c58e6ab6ad86ad2f83ff895529186c4. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:40:15Z), 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/QT3F62551163.