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 0xb3e3281f0a6ecdc5e916d115ebfcc80e0ad03b5a0d90bb4bc2456efdc6f9a484. 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/229b6e46-a86c-43dc-8114-94a8651d39c5.json and https://artists.proofprofile.net/proofs/artist/229b6e46-a86c-43dc-8114-94a8651d39c5.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 0x0819a1b64ab6d1972c3b44d6b2265134a0430db14542a33b7f5364658c469445. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6N22459407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90d6dbca0e5197143d6c3e6549962f647d866b93079c3ee9f646bdd7e2577b6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW2493242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0894c4e830ba857960e6cf9dea52680abc55b95bdf1089de4b04b3b9be27eb91. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM4TW2493243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d1eb666b0563fb0f61b4f8c8c552d6c2d78bb2072d6c39fe7c15dc606c469a. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QMFME2326152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522226dc4f43f6a158e615f415d3f442bdf7f2a0a9eb8cd2d912015ab20012ed. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM4TW2493244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6c6c4ee902e0e80d3d3ffd64c98c270552b5c69ea929cc9a1995e1596eaaed. 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/QM4TW2493246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0894c4e830ba857960e6cf9dea52680abc55b95bdf1089de4b04b3b9be27eb91. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM4TW2493243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d1eb666b0563fb0f61b4f8c8c552d6c2d78bb2072d6c39fe7c15dc606c469a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMFME2326152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d1eb666b0563fb0f61b4f8c8c552d6c2d78bb2072d6c39fe7c15dc606c469a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFME2326152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d08885e79d114e136250259e45cf5652f013cbc60cce1c1e0a3626882a1ba9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN32189730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1984e1cd39d8840cb1b5d77abcc836ae6836770c21a2502c67e70497cfe7cf7a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMBZ92495246.