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 0xf6e228f9a435916eb211d35b5ae549b807f5f43294b4a1629059fe5908a772b9. 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/954ac432-f23b-473a-a862-213decd29003.json and https://artists.proofprofile.net/proofs/artist/954ac432-f23b-473a-a862-213decd29003.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 0xf542ee74395a0685e9357375915e53f34d133fb640d5762fab941182e6433c10. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USSXL0800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a690f9d6f9e40c0b691f1b3edde67064285f968d00969dee707dad55e49eb30. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USSXL0800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58840ce9e9d96b9936ad8fce79bb49b8eaf8640367e48dbf82a5ff2ec545cf1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USSXL0800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61d938406ebaf0e09c133ae118f3f34eb92093b47c00e21033fe3b8eac720aa. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USHM91244615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf314254f0e2125609739c1c15336904ce006a0dd83c0f0b3b7b5a86681c45983. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/USHM91244616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b35cacc97cf42f1a74b7799da6bfd331866e815fd0453ab51b196960d1dfccd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM91244617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dbed3b9dce1079dd87ff4cd666ad5438a027123615f5d1dbdbee9bf042f8d0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM91244618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4872da08ab65aae2ac9bd2f6fc06cdf3c12020fd46457d90a3dfc78b2cffdd. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USHM91244619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ca8339abb687c35823954cbf000f183324ca1858b01ccfb975275ddaf4b351. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM91244620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8651865d734279de5b757534390ba5e30343ff5bb2254caf4fafbf46eef86a88. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM91244622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c55a56d24d843d3d21abb88c30908b0945c2af7da99af9a1a626eebf6f0465. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:25:29Z), 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/USQY51588314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33462c11edea70ee3bc4f3ca15369c428d72d0277d4e3b5ebb7309df34af7981. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USQY51588317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5f5e5be5cb2529f460743ddf5cfb8eef97cafbb1aa949233fe1664852be9a2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USHM22203969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09bdbb9f51f878c93d054b397b923642295ad623e4ec002894baed13f271d52. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM22203975.