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 0xbb24014c45efafbffec57410f94ce15eebf0cacc7a33cdbd14a008faab2668d3. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2082f039-4946-49d2-8b8f-de398665697f.json and https://artists.proofprofile.net/proofs/artist/2082f039-4946-49d2-8b8f-de398665697f.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 0x9cbd3e78561b1884fd75820763cdd8d4b1887c51090110a59a4b455f198a6d5b. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QM6N22054361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b78b844f347628f050f335a2c1704daa2190523009c237717088ff86b00079. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QM6N22054362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753c2b8b5c88590286b2904ff9ceb8a87978129d49bc25ff4fa065ecfe42f55d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T11:05:03Z), 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/QM4TW2105036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0677e4be36e969d16c4bcbe244699e0aa1839374ed441f85b73b00dcd0325a9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:41:15Z), 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/QM4TX2274950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a835db0b24fb6ab9601eb0989c41944bac2ed0417f22dc9b4829f57cc52deb6. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QM4TX2274951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a753e6c863b1de52979fb09a5c1859e62a3b8be9ae33245bd32af61b685f564. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAHJ2362148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dc9732382f080fdf55d5563d42db2857710e9ba7eb234c98eca25235814305. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QM4TX2274953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1265a606c45cc22351338af417106d5870d9f821008f43d905f7c40e89a06afa. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:52:55Z), 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/TCAHJ2362157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe2d3ceb6e0c716462785ca3403db78b4e549df0bdaafa2d2b183ffe6a5f1ab. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM4TX2274956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7be507de34fd9705bf81ed66862b965143affb99c1d9dbe9e1794a0920d5f05. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/TCAIW2454843.