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 0x42d47434e339c2a02852f9858675acbdff4fa8dfb32cd5a579b04c13be7bf558. 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/3c4cbb21-a2c1-44e4-9f26-e638e67be7d8.json and https://artists.proofprofile.net/proofs/artist/3c4cbb21-a2c1-44e4-9f26-e638e67be7d8.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 0xd49b1b7c1808f81f16d3f15cbd9a1be743538bd816a2c23e62823d0cf6bc300f. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:54:46Z), 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/QZB581900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d98b1918b97e989b0ba2770db2f15ad67bb1399d52fa6ccade473c0dfdf6e02. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZB581900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a474b0607537af39dae490f553805c16ad5910446480aed3b21e2a4f07e332. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:04:02Z), 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/QZB581900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0e4f40453c8c4d44ca186f1aaf59b5ffc4c2885e5eb06672906989561b5e6e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZB581900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd419d732eb17435eaa93fce46211f263dc703f11ab51b31728e91c03130ce4c. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZB581900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a366f87f400def65e4b08f1a8f5b70da2cbedb49ebc05a2a7a8b9ae90d8fa0. 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/QZB581900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcd3333aa5997850c5cee6aaf0d99df7fd7394dab91532b32df6976d1ee9573. 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/QZHN82167883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec22c3b845f6654de14dacc54a8742d7f8e89ba6e62da0229da3271970420ce. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZNWV2140232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02f6979aaa53903ba704866587cb1c03738f4ca2c3a5c9ac81c7b642944094b. 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/QZDA42264659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd672f38553b1b5ade6464346bc3fec2837ff5cdbb4f97456cfc36a53e8c27461. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNWU2272804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67744eae496ac4c35bce42c77e845a234eb7e8ce8121dd5963f51e17b0112802. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/IELBC2300001.
John D. McGurk's (The Heartbeat of St. Louis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867836a9ab235a8491e2f92b2ca2dc8c85c595e0b8c6eda72c78621a34556799. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDA62446465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67744eae496ac4c35bce42c77e845a234eb7e8ce8121dd5963f51e17b0112802. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/IELBC2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b72d123971bb896195840c143f9b0c99bda03631f72a2563dff5e104c2fd04. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/IELBC2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a118ca718a68d422e2284f9c0dcd929c74113f5e8ccd6fec6e68299df5ab661. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:36:38Z), 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/IELBC2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51706c03b10d705d4b47b08731106b2080fc0a41c6320993424ea8ad7a495bc. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:03:50Z), 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/IELBC2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d95b65478477ed8449b71f1f6403f5ad8c0ccdcd9cf33fbae5341f9d5bd0170. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN52471893.
John D. McGurk's (Live in Off Broadway, St. Louis, MO)