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 0x9539196a97b9bde21691e81133fb0102ad460b78427629c6c86b72e93aefff91. 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/773407db-9d35-434f-a095-31dbb357cd36.json and https://artists.proofprofile.net/proofs/artist/773407db-9d35-434f-a095-31dbb357cd36.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 0x2792532f0e614bbb4f515efcb97d7835b5197174c74e27a176b8132f2d316380. 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/US3DF2106699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006614b51098c935d6ad4630e1b5888a84adedde8f5b15c863f20b939b5e70df. 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/US3DF2106700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb47dfeb6c6743ddc513ac284e3a5adf90e715e9d1d6cc08253b97f026e074f. 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/US3DF2106701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd4784e756d9b8a7cee9b2ce462fea235dece2c2ca26b5108b60156e5dc5a14. 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/US3DF2107481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30991fa7844803c94db58c984ce2154551e871ea3b1bf30be0ecbf14ca9c60b7. 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/US3DF2107487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01be3392da6601489e901666248e4ff4b9a0511b29e0388dda6f38d6acef1b07. 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/US3DF2107496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1054b945f99152018f652872493197743d159d268d59db1907bbdd9f81e3dc56. 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/US3DF2107500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7742699a5c994927e25ebf05babed132aa8b21052cf87e036288ef7499b698. 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/US3DF2107503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080851035bb2b002dec52c58378eaf516fb8cc7a62ef1818a7f7152f3d9a1368. 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/US3DF2107510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40b59c351911154db82655b6884524c9b04d8fcc9de27bcb362d9ace9d6ffc5. 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/US3DF2107515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29301fd2b81e255aae73513170b9503dd6132943009e08d3624cde25c87b56f. 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/US3DF2107518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fc366cbc2b45176683716eda1700c3d4dea7af8a09e3eb008c6a9404d23f8b. 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/US3DF2107520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcef5c408412cff5d2ba72596ebcdb78f4c1860088d23574c4eef7af583375c3. 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/US3DF2107529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab39f4ecb8187815ba6064a651b03cfdddbc1868da46e7bde41a39003928900. 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/US3DF2107539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d6354763e288fa8b2e9d40c3ca564f6cc0e9611f5b8973c799d192a9cbc1c9. 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/QZ9QQ2300417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9baa73378f5db3f1d80dcd9cfdd52e3ed36de23e12bb0e3585a2be158f77f5. 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/USANG2292541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3143d406f2b91e262bf59e2f8688933893918c78fa5d26271efd80edf4c52b. 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/QZ9QQ2300223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b12919309c59a3d0ed318fd3bdcd626a268ede8572501fc7f0a484ca0cbf69. 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/QZ9QQ2200195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2405ff9d768ed2dac9dabae5b3ed815d550e5303a80ef2083222dc838ba334fd. 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/US3DF2296760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6819ee1ed5466e89248ce5f1cc59fa6d0d73260c9e0050574f736c305bd61cb6. 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/US3DF2232406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dce2c4da62cbf39f12c500f70678c971ab589ace902485fd64a837c8732fc8f. 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/US3DF2232410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5aac5bf304ee22abcacf76071e98797a9e465fc2e9c9835382922cfa16ed0d. 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/US3DF2232411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c874ccaf9e2f1c6e28a3310274547dcd01917849be3598c9eb8b89b5804e296. 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/US3DF2232412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8821a151952d84e89a60eccbdfed7cea5f307cc78106ba99b61c1ab19512c444. 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/US3DF2232413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf510285fa1dcfb63f76e848ce710105e7189870b2123f9d1c3ab8f7d18c9bc. 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/US3DF2232414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9166bedf20cd970a16a182751b5509355cbbd453b303bbd3e2976d96d8f783. 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/US3DF2232415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5db1299a9a560ff90b0190fcec6a942fdea58ba48458b15d1279b05e0beee48. 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/US3DF2232416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdae1b204c8b49f11b8f0fc078c50342f03055fec8288d1ada3a53a267e3be21. 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/US3DF2232417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990ffddd0fb547d7a2f3747f61d7363b205f6f7e0328d763c63c9bdf44991bb2. 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/US3DF2232418.