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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc3855b21281f4f2a33568eff77f81b7f2fe9343efb194bb6fc54788cc98141. 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/6a275c75-8f19-4543-b468-888b4b63510c.json and https://artists.proofprofile.net/proofs/artist/6a275c75-8f19-4543-b468-888b4b63510c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a600de334d3029a9622dd78eb6da4c30d840f122d2442c14c9bff918da468a. 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/QZ9QQ2300880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a61da4972a7a0eec0480ab6c6c41b761712bb2d75d6f51d95aa85f0ba02019. 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/QZ9QQ2300881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e3540e917ef80a5103eb6b745243667ccea5a5b7473cbcc8962ada072d3291. 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/QZ9QQ2300882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dbb9fb72a074f01dd2953826f87a462b2554d53e83ab486da25d8b164c3def. 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/QZ9QQ2300883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2b23c5fb41d398c6d566f707336a0b2699ceb4bfba9caa349708406c2555e7. 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/QZ9QQ2300884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe84a4cb1329a9f575d46f1898c867252435627b456212c263a65a8ca294ad74. 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/QZ9QQ2300885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729dd7f9548f5503ace8dc1fc401bfc7acc9e389df6e998e31d5d5ed22768cba. 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/QZ9QQ2300886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01caadd7e4cf6c86d61886e0124c3c46766eb6aec87e335490eed2c24576e21. 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/QZ9QQ2300890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabccb799e77e330635ad02c158ddb86b11cdfd83ac9f4511d3d50cdaac3dd60. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ9QQ2300891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af5af18ad1e14f1f5ca98ffcab5a75b8d8129dfbdc3824a26f0b492e97919d3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZ9QQ2300892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0800cb3cb81a87564103c5dd481599fefaeb3b037f9a13d796158e1247385ce. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZ9QQ2300895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76502dadb45b4953450e227d667f7450e5b8d0a90a9ae80f340f4179075076fb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZ9QQ2300896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9810af93499ae41969d4f2ffa30bef58d2e3350df76b9acc885c45bf122c8c93. 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/QZ9QQ2300897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf255489e3cf7203fa113e30761b9a69656bad9859190af635b209eaa5c4c0248. 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/QZ9QQ2300898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488a223b3fc02d34373e14c58cba1f459d7e08235498c1e885098310ce7efcaa. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZ9QQ2300899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95201d69feacb5db66203a04e3bf5756c2a6d0d930a192e9f45c57b1653faa27. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:55:02Z), 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/QZ9QQ2300888.
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 0x0b648715bb3d9d80ee2885ae30b3788a074a5cfd4e0e379f11ac4a487abfa2ee. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:24:00Z), 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/QZ9QQ2300893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1e16ad0644e8bb16c0f4964d7e4f787f8c332526bdf5ab6a375dfa30b16d56. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/QZ9QQ2300887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bb60f189095f66edf057e1bb41a0785f059aff4d02f67ea783803589c2919d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZ9QQ2300889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada6ad001bb2a23bbcbe6f21d6c74107c4c6a9f8ffc74dbdde60cc1f6761c4cd. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/QZ9QQ2300894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d15c02fc20986bf4815880feff683a4fdf1f2efcc7810c69ab3c45dd508fe8d. 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/QZ9QQ2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c8c284e98cd0025ee2d01758abf511b2d63ac30e5ba92eecfa3717afe72cf3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZQMB2107252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc198c71d81fd2e3e407ca008b712b492df35b2f68cc9bab54b1ccaf4dfb85cc. 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/USDXS2203497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc703d89fccfaa4b1656255825c52e3a687132ca78cbd66f6dda8335e37cf9f44. 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/QZDQH2438135.