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 0x5dd00c3d4aa25fc732c4dd7ad2a187f375ea61ba1e8e84014673a86aa9aa5456. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72cc2001-3c07-4569-a3aa-4885afa3f4da.json and https://artists.proofprofile.net/proofs/artist/72cc2001-3c07-4569-a3aa-4885afa3f4da.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 0xc0ef73c84e6929c0750f203372d8d58d164413c76a331f2b2f35ebb70b2ec686. 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/UKG8V1600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82a08f9f685f8c94defe0507d24e5e3b5ac054cb6205d6a87cd045747fb2dd9. 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/UKG8V1600052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5149c16a892ed09ecb82b9451bc94522e9da9f073d45468afcd1723e15d07ac6. 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/UKG8V1600053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643f20802d3cb41359b7a0b63830360d070d836b09f1fc4c7d60a9b3470a077c. 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/UKG8V1600054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848f20f29b3e8f7d99ce1dca48f1edada3451c36e0d9c2e4fc3a64dbdcf74fb5. 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/UKG8V1600055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff1397e81572e736d5098603d8506806707f34e083bbdaf3cc8b43a8ebe882c. 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/UKG8V1600056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc018f118db455d603e2a4eb15d508c795f7cef45c29b9498c9cef39c18bf7f81. 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/UKG8V1600057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ad6fbcb57c6af402b6cf40d81c18e2d98cb68023a52177ff2039aa5c3ea03a. 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/UKG8V1600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2512e92033bb840f0d4ed43786e23574cfcf72b9e59b7b29a63210e50d661b4c. 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/UKG8V1600059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde694799b0ca6c7e390b0d1ed9bcd581ace9217e71b36cdc43efa026b887d240. 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/UKG8V1600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700511fccc777b96e1576137848ee9721b6c217b91c073261d3666295d4b8f27. 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/UKG8V1600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3addfa9f14f49d3c32e48e7fc984cb1bea0b9f3ab418e7c5887ad8553e6aab7a. 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/UKG8V2000650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c580693a0dfde378456b434211fab9d29340a71a6f0546ef9c49b984fa1f8a. 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/GBSMU2658084.