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 0x63564c240d9326ed9604b90d7f55b3ec7f69873389f43dc9e395fc9ccbdff130. 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/d3569b80-36d9-4a75-aefa-d2be01af114f.json and https://artists.proofprofile.net/proofs/artist/d3569b80-36d9-4a75-aefa-d2be01af114f.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 0x6d4732f140517542ba30697fa373997f5fdac17bac84d881f481ed0ab250931a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NZPB12403383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9ecb3e9ea44b372c4a5fb678cc1fbdf61e1d60b14a82f2bd48b9e29ea40e41. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NZPB12403379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803f0e63423bbae16fabde22493d35c590501f830d0de3919ce307556bf88109. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:36:30Z), 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/NZPB12403380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9ecb3e9ea44b372c4a5fb678cc1fbdf61e1d60b14a82f2bd48b9e29ea40e41. 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/NZPB12403379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004d4462ea0aebd7397304f0c1e6b4fba37bafe7546a9a70248f766e20dee413. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NZFV12301228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa232ca12dfea5a5d4367471731c103194ed120fc41bae0b8b5cad508faec34c9. 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/NZFV12301153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909069dd64ce028d7ccc2fa4b4562a0b07e3e4b91c33a3cbe1a8534ac770fe9a. 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/NZFV12301043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b770369c4815f50b3df2fcae3ee01ad8d8f207f80ebf11fcbeea8b46ec8c914. 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/NZFV12200151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56af6ce0bc18bdd3a2b8d898d73659578de3471ccec1fd6c2b81acc7b34b13fa. 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/NZFV12200119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88a4fb91a8649b136ba3327f9ef0fe7ea2b191b6d3ee0806c9a537b1d96fd5a. 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/NZFV12200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450b1d6facd55b7a5d525b73c61bc9331337a48cc518c3547ea2d121fc0227db. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUMEV2250736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cb86588afb9dafe1778bb88c3c08d694eeb44decce5ad42d20ee1f082aeab4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NZUM72200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6963ef86fedb1a80a2d4ae6baf5670b5b8465476004ffcc43743eb27134fbb. 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/NZAM01801485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee22a1c4b4f67c24f126d0a6d0b6222fcfa7255584671b98d1c17b88d596ba93. 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/USUM72118750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767e8c5549cee814d483b615bc00fdec49b1ec695eb2fe8169fb35d8d0d2709c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM72116011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb191622d81bc0766ac70482666db717db85c54d9d3b4f12a62a21030e060e6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM72104084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5432f23582e742420753b87488b9e9c77301e2faced1c66be31fc973a5b7d1d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUM72020803.