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 0xa03f1a261c3e33724d93a7267d18d8be95c48f09d8ede6c9a1b94d8fc27914ca. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/891996f3-7cdb-449a-9829-a5095d4f90a4.json and https://artists.proofprofile.net/proofs/artist/891996f3-7cdb-449a-9829-a5095d4f90a4.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 0xc79595239201ef22ed04e977f2d54bbafe02de163bc1329fa67c8d2f7f45a251. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/BGA261409996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe4db6ffb3defc414c929228912ed78d5b7432aceffc0b860c0dec5b5bc0d7f. 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/BGA261410001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a1f6c35c25ebe9fde3ce07d69a49db2f04143fb2678b0b011383aa47f0ea8c. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:43:55Z), 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/USA561031614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c5f6245d89d23da223643ff33a6f87ad3a0ef4f8efc7eabafd40d521a52561. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:51:00Z), 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/USA561031617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d34a9fd1413d4e406dc69a603f2f16e22b8c5e4549722f38016e3ff3f7f2584. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USA561031618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fc275d2745c10a129805ccb95830a6dd82c522cf83126ec8e13e9eabd76cba. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USA561031619.