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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580b7e7dbc2161de97bb2e3bef50555ef10ca71fde3535594f6ed50c1d988fc0. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83e708d3-68f6-43df-ba70-46b25ec81797.json and https://artists.proofprofile.net/proofs/artist/83e708d3-68f6-43df-ba70-46b25ec81797.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baa4a05c267a892fa9ddfe4deff20cbe0ae1b44a34e30eb582bd498afb114c1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZNJX2175948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352cf55c2dd7909580738c6740731d709083946e9e26fe4d1f069ab45d2c9ac0. 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/QZNJX2175950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea336e8ff46e963258d334fe6f45bcfd85a63e5c3d632a71e6af32bed4886545. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZNJX2175952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6e3fdaf49698b00fa8b288d6c125cd85148d5cd3b4fb8f988c11160d78a6c2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJX2199090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8780404a7ee0c798bd28e9eeb2aedaf99905f23d53a44321959967db7833239. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZNJX2199091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb093f010c90a76e9b7d7814dca096f23e8dd87b02c862b9f5d40444bbc1865e4. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZNJX2199093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898d37fe3935cfd4ba4d1f5f79515b5feceb5ce7435745ee291be1a6b8c72219. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZNJX2199094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ba2a73629e7281dc9e851d252d8b3c0a3e83f8ef8b69d11b91ac40a1855e67. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZNJX2199095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced393d3b51aed4c2e8a560cd19c88a7b6023de99d7ca0a7d3790fb04f8ff5bb. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNJX2199096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eb6927c4a2b9901f730ce3c3c653931f27a086e1f6b7d7a7fb6c5b99de81c2. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZNJX2199099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632554e363c47fd642a998cb3d2a71931a41cabdb694b9708ae317588f4b54ae. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZNJX2199100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f20d62a8613319513de5811bd5b93c835acce264b6efef16cb1b6e097cc999. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNJX2199245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a3ff7d3eb7800df2dfb9986ea6cee1e81f40d60ba53a3350e6e45993f8cecb. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZNJX2199248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9584f1b225187398118be0c86299128200a02b16be131b81d2cc9736618632. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZNJX2199249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516b7d2a18b18759dac66fdc2c1115dcf607dc90a1acb682d4b159eaacf2e9da. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZNJX2199250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbcbb4d5c5db1dbd3a993125735f9a91fbde61d1ae24719398afa084fa8caaf. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZNJX2199252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b74d244db66479c2d8dc1ec4ab87bee09e121faefb828ba2f422d526cded5c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNJX2199254.