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 0x31499e00c423bbc998c95cde333a8175ca2ef79df5669a8c95762965eaf58878. 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/857ac1d8-2be0-4d9b-b187-6f77009d16ca.json and https://artists.proofprofile.net/proofs/artist/857ac1d8-2be0-4d9b-b187-6f77009d16ca.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 0x38fc06e77f4e650cc1bdf5c1e4ce6ff4eabbd30b835205a7150d526b8ba1e9ee. 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/USL4Q2017995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882785f319ae875de082ab940f1640c53c5045f3cd4a07051e89ff255463bd24. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:57:49Z), 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/USHM82005051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7953fc94e107efae652309d5f205c8bf0d5bd9c1cf4099b0dc5c3dcde202cc0f. 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/USDY41558035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea117f9333f63e1b3b38e6805ae62c5a07c58d92431ce30bd924375135b8769. 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/USDY41558037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa298e7451c2c1880975ac14f0b06fe8ecb2e279ce93f5434210c24d2306d9db0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USCGJ1229452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe169bdff3e8ab264e141e7ee18b70ece3170f0ce8c9e8832c0c59ae22b5f6fd6. 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/USCGJ1229460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8dee4ae322991527148e754567a9cfe20b2cd59cf8781eb891d650ad33bcac. 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/USCGJ1229462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd21a19ff4aaf9bb0d5232211adb6ab2f29da1978275c7edc30328e97f37cd4. 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/USCGJ1229463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84199439870e3599de7c806c7236c885442cef8b3cc6dc8dd4323307c83957ce. 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/USHM90999050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62901a29f1a5805ba59924348ad6d80c1d80e838f59c26f1aa86403224c7c5d2. 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/USHM20807701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837dba1a000b60c4fb5d0f2712eb61e769c36579eb045ae932306540fc1af38c. 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/USHM20807702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4608a8a61f639d47e0b7145af8c5760aff166029849bb57ab0e72d9a173ddaf7. 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/USHM20807703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791a6c545bd0f68f5102824619b63c60eec11ab613d2d6bd6a8a4b1cface22c2. 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/USHM20807706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318df66e736e1286198a6eab27c99d1b4fc1af1b9de71bb9f79b94de3142aa33. 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/USHM20807717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e96af00f9ce961e8dcae55aabb62b6b030bff5c7d22c2243faa48d1464df71. 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/USCGJ0642747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a12dddc2123e0009168e0ad19d7795f814c9612221a8f8036ab8084c87960bb. 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/USCGJ0642759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ec29bc6062daf92b61f4aacee841aacaf9469411df44ab9ee8fbb72fcc1c5a. 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/USCGJ0640077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3716aaf70ef3d39097045db261a240ddf12e7a34a37bbb8c1f91f0c0a106fa6. 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/USCGJ0640081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b14a2cd93b55aa34de0af1042e13c4d1bd9e8083ed09495f55d3e56d6c19d6. 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/USCGJ0640092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5dd989c33898bc5b54a25bf4c52a8367b82148f9f57ba65033ee0d6857d4d4. 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/USCGJ0640093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaccfbe8e321816f21d32cf35de33d47a4f941a2a8d6cf77c2e74ceab3daa4b. 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/USCGJ0640094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98029cb7ccbd84ce113b425559a0915bd40df7f71acb87fc9438e32454c80938. 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/USCGJ0640095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b63f4bedcdfc563a12fe42d690930b571fa04a8f1d9057b1154e6cb277fde11. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:16:55Z), 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/USCGH0536981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a607836117c13b9721f7308948cee7d12a2cdfa2b184dc462d5300786044b1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGH0536984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe64baa5f039f1b21118095e6357c3077addfcf18b4a064658019ec16c3e3d71. 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/USCGH0536985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2316dead9a94dc59fddbd4a9fc838a38d763a03ecf1813963c6ef9ab6d86580. 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/USCGH0536991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567774d880889203806e40ecc1d31aa0969d8ea8868db95ee5a1fd4826936927. 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/USCGH0536995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca90abbba62a3fb3b97d0168c403dd3c7a1b17c3f97b95531bc9a37501f5052. 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/USCGH0536998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26bf2108d617f67e6b3087a2529936e715b88665f96061cf2f8f023401bee93. 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/USCGH0536999.