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 0x4d23f59c138e45a9497999075fdfcddc32d9e7e2419ed266f485d02983eb7738. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddd14a2c-ca1f-4a16-8beb-428d9dff4be6.json and https://artists.proofprofile.net/proofs/artist/ddd14a2c-ca1f-4a16-8beb-428d9dff4be6.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 0x52742c68eea847b3764b0eb89b71d1718e15a8862a6dc25a10ebbe07c6adb50b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:08:24Z), 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/NLKRM0807202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0846b596d35d022a69d1a4c45e2d8747ffaa53cad1825239cdc107a87787d37e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLKRM0807211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5b088755b4bb7ef7c7b889d2b8e0659aa551e8efe677ecd34681133af852c6. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/NLKRM0907001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370c363fa42c3917ccbada27ab19a899c9cc841001092357fe5033ca84056ac9. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:33:52Z), 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/NLKRM0907004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7b955e860113e79fa29bcc3d6a612115fc319daef1ccf474763e492f422ed8. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/NLKRM0907101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe616df44454ac945bdfce69a89de996eca3e26ed3846f0c90fffe5a02866eaf6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLKRM0907102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a0ddb032ad3f72abfdd3ab9f37f98f910cac823076fd8df9165357d2d61231. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLKRM0907103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2c67bba4f9916875ba0a738e9f528e71d8b8c5a567c9c8cc844af18845f36f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/NLKRM0907106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb601e25ce6ea25d95516cb81d568ccc4bb9bf60df850948241716b7f22944be8. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/NLKRM0907107.