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 0x29d074b18221df4ae070d2f6fbb4985b8d71fc7f1cb28fef0ccf6df80e4414e9. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1808fd9-b294-4699-8831-3d791c2374cc.json and https://artists.proofprofile.net/proofs/artist/a1808fd9-b294-4699-8831-3d791c2374cc.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 0x8f477923c5f9ab900d519bac78501422131369024c9c5cdd77a2580c017a3296. Chain 2 (Bitcoin): anchored in block 957616 (2026-07-11T21:52:36Z), 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/QZNN22352633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a6d137f189a475f014b0bff9892f35f77d20948d3644cc21afdc4411cde902. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZNB82451854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7e8dcdb02ebc38803c0581277c07b85f9607e72ce513a844087ac6a9c7af97. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZNMT2486384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf635a6bb2dccd569067a12b8fb28d10ccfc02eb4b4113f75559b402380986756. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNMW2493916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e440456be3cc980fae7eb800555e7a8202dd0fb42c2a27dfe6a417683a1c7ca. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:18:27Z), 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/QZNMZ2419636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8ac5c2b5cd90f1b680dbf12bbec8c349e0a17073b3a86cdc2f3d4be53aef5a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNMZ2419637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b067fa617b760b171d03d4508c5ae9885e8ec98c50480554064db03f86de4a0. 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/USLD91761121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a0f4836fc96017fff1f26b537ecb1803d0db3d98c8803bbe48cbd2157b3155. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLD91761122.