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 0x6246ae4c3825495e8e097b432d56f2357b86a2c52e55b86bb81cc469dc972228. 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/74735a0d-097d-42c5-bbc6-996bdb7d6708.json and https://artists.proofprofile.net/proofs/artist/74735a0d-097d-42c5-bbc6-996bdb7d6708.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 0x0af804a8d57be59944181eea427d713ba28857e2c045058c63629cd596d20045. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/BXPFY1900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8aaa636770a4766393cd9ad45f5f666462e0dd7d361ef91827b4512a3106fa. 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/QZMEV2399650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1d39025a41e2d60207f5a2aae42218a45d1140cef766a75e4c38a5614ce3a6. 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/QZNMX2390074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64e329af4beced59026d6868cf99083379b2dca41cb94567941f3c147a6cb2e. 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/QZNMX2390075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c186fee95cd28f3cadb44606631dbff2ffd8690d977a0e6891e806f05eef18. 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/QZNMX2390076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240070e4c23291c44f5f08d2e24425292f5278a32d08af86c953887a8043542b. 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/QZNMX2390077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21144e9e4f22b66765479eb0019e28262edfa6d57539741ca3a2684d98208bdd. 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/QZNMX2390078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ed3735d35b7328e9313a998d51befd62d569b0de31db91b5df9846569fef66. 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/QZNMX2390079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1267c27865bd200d706368944cbd63cd2c14e1aa0fa1ad7eded399eea82fb210. 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/QZNMX2390080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce082eb996901fb6af37185042194a27b31073844ed4939717a55a4f92a239d. 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/QZNMX2390081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfb8c0e04e20379a1af042769420278ce843727af10632cff3f3cec219fbd13. 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/QZNMX2390082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08450ab113771c40aeb70072f7907fb3a5468f73337d1226aa38ec145346ea24. 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/QZNMX2310142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb512e53a53def93cca7d58f7c853dd921ddab00ea350f01385ef7b8cebbeea67. 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/QZNMX2390083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c87a2009a09588bb2feb4f4045e1fa7bc0e41eee4959283cefa0e7b8c5a55b. 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/QZNMX2390084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61bfd988f982d18b1d43f378910b3a8d72438a872b2c5a1560e94b1f5d08164. 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/QZNMX2390085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb4c94d06bdadec8167a044b49137bf822e64e66d518c0853cda3e9b8d4196e. 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/BXGPM2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747cddfb94b28cfe4d44305c15fb651bd7c3f1dc2e9ababcdfb1087895a9a445. 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/BXGPM2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47842a106e7d7c154cafceb1fccdf06f701ecb9daa3b8e557e4d927374c406b3. 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/QZ5FN2133601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90229816140d23c1e6e48ffa01bf123d1a66e44ed6b52c8331b3fb1aff2f5269. 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/BX6Y62400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7692f5fb2a341737bdb52d2bf59439b2be8ce28e227ae839b04c717d99467337. 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/BX6Y62300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f56c938b0a2ca3601538bfa4d6b2838be6c992c48742629049c83c57f22f3cd. 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/BXYVJ2000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b56a8f941580a4e2c63edfc72a0075002329c0cea78b151602b25621b3d9a7. 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/BXYVJ1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc879863344cbfc6afa6c0e0de958660ba2e0ba3c9331b0563a61d36533790f. 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/BXYVJ1900012.