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 0x6a4c07d125c3ca5a9a08c89be57b5ee86ba765d0aecbc8a6c805b0d707824c94. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0e88fa3-22fc-4a3a-8099-ae095312df7d.json and https://artists.proofprofile.net/proofs/artist/f0e88fa3-22fc-4a3a-8099-ae095312df7d.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 0xd4d11746ff0a1a932563abd569b4ebccce52a82548894ea00defbcc810e08fa4. 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/NOX8G2400216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d1f47679c23c2a7fe17e1c38e64d03f2cb970245d88a949129ebd7509a0b2d. 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/NOX8G2400217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc936a1a88fa5c325495a4903e727de6e284bce720200ace7a41c47e53ab370b. 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/USA2P2422109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d578a7c368276970c802a3c11ddd3f15343bc8fee8d6a2a1f90b3c944b878c. 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/USA2P2422110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d3b4ebc2c07058a0243ceadb7b77fa58161f294cfdbc7da4d28fe2407b0b76. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2422111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca992b091e765a1a04a9e448e60af3386c7390d63642a0ba34763b328000c23. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2422112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0604298d3eec122ac3c420b60d8e0ca84cc69b3d29dcd6e07dea21e59ef59dc2. 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/USA2P2422113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd187da35b86911884c212d9f3b4b593d1a600378c4bde8b0567493ea6649b0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2422099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9959d7c062370dca124e84b534a3fbbccc5a0b65abc4f2bb6f800b18f4891e. 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/USA2P2422100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e44b654f0b2fd07489cba54ce4097be12bef7df141ddb34c99243940f8502a5. 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/USA2P2421919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e159ef0a1e21db1e447dbc0b9f78b55e77d3d2afd1a685ee9b3c22b7fa7401c. 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/QZK6N2431233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c25e1ab635f88b8fa2cdc59a9833e73cd721ab2b231cd06af0458cb5cf85f0. 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/TCAID2460622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cfaee0da771c46779d798c9a48619eb224b81ce426ee3f0d45c2dd8736521f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAIE2460636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975ca06e7d1236f6df2ac105d910f39ae70b328e11c6ced28af1cfea239562cc. 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/QZK6N2432648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4daaa758aa3c2b41610bd210dfdf35dc9ff49ec82b814efc3ea12558623b20. 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/TCAID2471438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996a1ec028e166d119c11c656af842f0f3e36cfb11326b52a29400009fef5a71. 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/TCAID2471553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61904e48190f50ebfd9d136565daf0c8b9a43321a72c487aebe2ab46efae9e5b. 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/TCAID2471635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bbcd43a42ef6abea289ba5559c1e2e421625c86affc3b132da8e719787f643. 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/TCAID2471679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15ed7af734445d1c7fc493e54f172f5ac8c3457eaecb3bf8d0f3da9cf507c1d. 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/NOQ7M2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f4b1c37fb17636935c9ffb3e311cd6a01609a9a2095da9588ecb8c6aa22bc5. 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/TCAHY2455864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8edf8acc489e9a30c0449989b30e35f71680013cf02a75cd90213b8593c257. 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/QZWFE2321611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e1341dedf0dca945933dde838b1ddf59f073951b3383d8ed0d59d6439d4612. 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/TCAGZ2367344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f67c46a58ca219fcf5251ade5f501cca3e051d9f52c24879e8c832df720f0f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOX8G2400131.