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 0x470691e58a891a5e99569b11c8a22d1324af48a4e89d3c9f1bcd6ed78ff03944. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5922b6d-e06b-4687-aacb-e3d99fe08d3f.json and https://artists.proofprofile.net/proofs/artist/e5922b6d-e06b-4687-aacb-e3d99fe08d3f.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 0xcab8dd5519067a3d6df9600538a4cc1a92c1d941ccdec70f5e52ead19290a969. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:48:10Z), 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/TR0391300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef917aea73ee0c87f73749aaf336e7bdc491f265e546cfec7a3081fc3d47351f. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:54:14Z), 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/TR0391300162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360c7dd42093c24e1d7871ca8f9b5046071a432710433799162dc81d196d2298. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/TR0391300168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3495a67ab08a00c4b5e2f08f64e141ef5c2b939a971f36e69fa0acc1052e5b. 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/TR0391300170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360c7dd42093c24e1d7871ca8f9b5046071a432710433799162dc81d196d2298. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TR0391300168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3495a67ab08a00c4b5e2f08f64e141ef5c2b939a971f36e69fa0acc1052e5b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TR0391300170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f5a5d3374de9484cd2b4afff08ce2cb0643aabf2176eb091b83dac81a6513b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:51:34Z), 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/TR0391500247.