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 0xbb402581658bedadb2e2f0386c16b0aa979914bd805451f7d39c42bc0d558627. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8664cf01-ef65-4172-a512-f092e90ae9a1.json and https://artists.proofprofile.net/proofs/artist/8664cf01-ef65-4172-a512-f092e90ae9a1.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 0xc943200ab2c9e731f0d57476365524a9ccc4ec557c9de79689cc7c9e81282429. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:09:06Z), 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/TCAFT2167031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff2eef0463b01c628a4a385784e23d6e6147b007639b25ec2b3f2d7d2cfc552. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAFT2167053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac06a90d3835a9198517dac9b1b6c9a010ee30bdb5abd035d88d9673490d4cc7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:21:32Z), 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/TCAFT2167080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c4d0f1add4874d53dafb20d9ea955a9b50b01cb0003c4653dc6bca45cf826c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAFT2167102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9c7862e55ccb2c9cfa38d796d452ca0755d5a7030b0192c9bb1e9e3d9b2b62. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAFT2167110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c47ea19ac83877114ca6f72c8f5b452f7d24e5ecfe99574ea02d26e557ef80. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAFT2167131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6813246487690600e514d2126b07b087aaba56bb2711269802aa6bc4473e1767. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAGZ2393282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e7eec678a4222f9975c655c3b6802fbbbf202876c4707c04d11917f30bae55. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/TCAHR2378457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93df11d4f834f8b8c0527a091596c1189690194fe2a3d7a2a2c9bf4c7352671. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJK2500827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e7eec678a4222f9975c655c3b6802fbbbf202876c4707c04d11917f30bae55. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAHR2378457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6813246487690600e514d2126b07b087aaba56bb2711269802aa6bc4473e1767. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAGZ2393282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65d79a9f9f5ea8d886f979cc47f9dcbfba3d0420241132f891b866fbe871d23. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAJJ2501400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b55d26260dba592bba7cc595dec10558e28f54faca8295dfc7ff10fdee7bf2. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:16:19Z), 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/TCAJJ2501502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bac6b12b32c20d87dbb0095cdc5c8e4033fd8162b256be0166a2a1fb8ea3165. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJJ2508904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3147eb869e669d1a373d456646d2a99fc773cbcb31e5101e909659658469ee. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/TCAJJ2509473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b35e1fa232d1f610147dd26bae2c687cf99663ef67a7b78d0034e95173d94f4. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:25Z), 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/TCAJJ2509529.