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 0xe34955fc109b78d84f9f59ef3476fff96dd90e88d0b8970244cfe426b2ca90bd. 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/e7b96e84-2c89-47b2-b878-a9e60362a3ba.json and https://artists.proofprofile.net/proofs/artist/e7b96e84-2c89-47b2-b878-a9e60362a3ba.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 0x94e91505ac8476cd5bc9cb8ec4f4a560c0abd8eed845264835efa4c02d2f1d5f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BK4442400187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525fe3f87c5d408f342f97df656dd420bf8f25e57dcfbd4c0b0456b3f0e9ba9c. 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/BCGWP2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efe4263d7e0494391f2e8d04030d5a541da90912ffa61479b42d8e056eee51c. 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/BCGWP2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901b7c44c25da00be1720bacc4dcde5ee6a7b1590d9dc655ad8f9d8da52495ed. 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/BCGWP2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b27fa3bd030d4d4ecb29e8818719401c7945c252eed43790a9a4db11040103. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BKHYR2500184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546ac34ddee5c05da535d0e073aa28439f7c85a32943c179c15df4652f1149e3. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWDW2540744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e8cc49f857d8d30ed872112f0085c6f45502f46b81bbfc643a9ece6f8d955f. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/BCGWP2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384153a6c911bf15333dc02c5071f1e81f4a6353b1b9aa99bd0431c348f0a83c. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/BKQT82500206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddf187357cfd82dd7b7cedc189f0aaffe6fbde8cbd36d9d74e4d69a8f3994cb. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:25:06Z), 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/BK4442500586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90d3e1c997dd48e1c0f211035423ee20741f5978febf8642424289a3bf8f903. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BK4442500594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac22cf65912eff377d5121021bae26dd243fa401e53f59f980ce19d10934a9e1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BK12B2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938eb9a5c8050ba2acb6b6e5a4986dc5ec2e6cae257e77138ae8e41039ac55d9. 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/BRWMB2500358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3323aea92a6b25b261123219be6d158c89ececd96edbbcf81f7fc66b9a303b. 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/BK4442500127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b138c7d5aa9b0fcae9247fcff92e8376bb7485dc3faf364ba2e9f7c018acc4. 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/BCGWP2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a333509f562d906f99ed7d51b099cac49ec6b288b85c4f05fa9c65186e72838. 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/BCGWP2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc541b32e78c3d86978d97bc0bdbcffb1e37fdbcbbb9f270e85ccf02693abfdf4. 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/BRWMB2500145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbdc793432bdc0300b5b14d177d1fb27877277b0fefc25ca495d86efbc60d7b. 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/BK4442400369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0840c6aa154ed47830fb8510c0ee5abdf741e4bb2d5c6aace5ba6d8ef58c76. 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/BCGWP2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aba32fface5fc40514fdc89f4e5fc09b10e7e09322ce66daca14ff54891a9c6. 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/BRWMB2401922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a965bfbbd2f8600565b7379fa316b55349d9d941caf71b41d92ad21644d30f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BKHYR2500179.