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 0x4b336e585b7adc4cceb617a035915bd24b63b8d6fdbd53260a4330c8ae9e3193. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb7cd64d-699f-463a-b21c-4c4c8774dea3.json and https://artists.proofprofile.net/proofs/artist/fb7cd64d-699f-463a-b21c-4c4c8774dea3.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 0xd121acd7525942c1921c85b9403d6da6eb7ca88a7b4fce52c42b72a8db923d61. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWFF2437789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4759bd05c8c309021e5c9db32483e340e957a1114028969e673f398ba6fffaa0. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZWFH2410091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841100e293ee5dfccc583e55062d5cf47fcc041f3d42013c5dc05ddd5763b521. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZWFJ2409627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffd71973be4bac341fbbff060db6e128d4aad86db71ec7be4b1a9fac144babf. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWFK2442406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1aead2f7c9057bb69a473b7dbc8884ebeb880b589fd748455ae5a7c02565e5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:31:26Z), 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/QZWFW2402343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128347daeb8b79fd6ab3e48ec54aa833d2bedf7f8b5a4f80dd24b32635c69832. 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/QZZ772487016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda35747d4e99105cac0d8d4d0a62e0d8c290625c8663efc636a15ecde0f3ffb7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7P2468897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba903d708f061552067a3fd458f9492154f12ffad3e2482597802b2f49fd0e8e. 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/QZZ7X2488113.
Squid Game -Mingle Game Song “Round and Round”