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 0x004b5dfc09ea262f6dde0fd9d063d5954e00530c62bfafc7d1259af34a1081e6. 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/cf3097ca-a3d2-4a33-a520-48a62662696c.json and https://artists.proofprofile.net/proofs/artist/cf3097ca-a3d2-4a33-a520-48a62662696c.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 0xda3fadd227f98e3077452e6d1dc4461363f10ecb44aa4b3bf8f3d70edc6f5012. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXNT62205149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f967ce16423f2b1826c6272e13d46508a0435c7232a2a4e552e69dda5491f80. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXNT62205063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15bb0072722f74f3041091a17f12de44c28389c88c8901f5a4703e8b3fb9ae7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXNT62205074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee776b1a528697eb44cc94f3e6628e5cafb5de446a580e7161b793086bb5d66. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BXNT62205073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df601ecd38d2b4f57718a761c1312230f5e2ee3a9011d8d889a8a9925f4e805. 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/BXNT62205012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46311844c3141c65d95e530ab45de1408048969ad0a5918b3442e4033c208ef6. 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/BXNT62205011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784ada678cbf42d04acbfae20214d0c74b31f7ccca2d82b13c42b30b82be9c4d. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/BXNT62205083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5f72491414895bdb599266b1423fa0f348d21419116c5ce804b30488b009de. 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/BXNT62209393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ec57552c6f6cda8c1dc05a1e8bc7fdd54f59d196c05920574c584694329b83. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BXNT62205080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be06f2355d20257af4738669b413320ef5485d8c7c0bd7760114dbf3398732a. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BXNT62205079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eac43c0c52488aacc2bc2c0b06097b457b8f181b3a3b9ba340304309d60d090. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXNT62205055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76260038c8eb5e50df44dc1a8650a0aae854d516527f6c0fcb01222f49580f3d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BXNT62205041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d9495e959bbb13ad3b080a0db7d0c38530c017bccffd3c04d5d6f845053cf1. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BXNT62205054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeab1eae74963015c2b12741137dd4e3f759490cd3eee1b87cb16124765c439c. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/BXNT62205144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4039f36c2633f0fb59666dd4da5e48fe2e285cd12ffed109147282d347f7be58. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BXNT62205148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1f36fc2b1886565e7a47799ec38bac533478a32a2e7a1755bfade775a77921. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BXNT62205147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8766ed46affd1a19b0d98d5b9182fd1b24a00498f08c21219044c3761355b2e4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXNT62205091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad589809e688e908c1d21ad4c04424d4a5dd1a735c8a0cd53f794d11fe77bbe9. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/BXNT62205053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0d5e447078d6a2ca3c1cea940c0cfaaf9c2084c0deb84bf1f93866e281920c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXNT62205078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96786768cf1320531bfc759204a05de061deb97787b758b4eeb1f03ebd2c4505. 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/BXNT62205072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7161e36dcc9b536175462911b2e168f361c9123811914b012e1797b63825d156. 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/BXNT62205141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c689d76c501015cfb14698b42896eba1d2fa9a04a28426703a1f7dea7667d7c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXNT62205047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b824bc47ffe4c9f9d1b82d69473f063cd6671462911a32c47bd7bf8c96eb2df. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BXNT62205139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbadc1f850b2fbc56aeb3f95ba804e6f63b5a869e654a4277cc966b6ff9003dd. 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/BXNT62205136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd39414767ddce208f05082596eaf8e9cb89abd096ebf1499ea6499a1de90c71. 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/BXNT62205065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd96e585fbd541e643cc35c27c7087ef2c69a88212f8d1d80b1f022d7beb1282. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BXNT62205070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef456e3a8e1c685b8a40f06b3cd37e2c2d3134b69847974902a0023bded6641. 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/BXNT62205069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd4564efb8757df8c886f39f30ca0d4ef4a2eda47c129807edea8648f4f3f32. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BXNT62205068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd4a93e44fac65390566e19c4d2af3bb507aa9eef6e03645d75217c4d31dcf7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BXNT62205062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71ec1d86371bb98eb1b445783af098dd7050ff9d53e8eb2a66c8388ef054c1b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BXNT62205075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07955f85d698bab4c72b33f53be0066ff82d13faa4dba901f1ba31ae79b43f0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXNT62205067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873252c54763271fd2cfac40cc36610b75f6d85706c5047a235401d7b7d3d63c. 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/BXNT62205066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0c215ead1eb63914e85563490527043c5335b45adc9d53f40b4b5a30516718. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BXNT62205061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5daafa7598e26e6348ac56ef8033ac3e3a6c55a00fa56413ebb7d3d93098a3. 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/BXNT62205060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be54168d25a6a1e10eb279e49691e91912adf88deac45de2cf6577ab4ecab98. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXNT62205146.