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 0x4a1403f9c9d226977c2cb322e02934063d81eea2d350620be7d7d9c49c5dabb4. 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/9ab748da-6fd1-4af2-9359-0007360790ef.json and https://artists.proofprofile.net/proofs/artist/9ab748da-6fd1-4af2-9359-0007360790ef.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 0x7f556607053d6cfe1f9aad8c770b5046b49cb2c73871927788059ca42ca36e3c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES5930900134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0d35131f56105286b93ccae93f8f96d0b2dc7c1b3d5743860f4b0fb76280f6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES5930900142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa427b82df05fcb6d95d23c7ef4e2e242c9a5fcef7383b4c70f3a5e11da4af8d. 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/ES5930900143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9f260d08f3740073d23e5d332cd3d47df52726ea065e456eab9b815b609397. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:04:59Z), 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/ES5931100523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9f260d08f3740073d23e5d332cd3d47df52726ea065e456eab9b815b609397. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES5931100523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4363c3a876e7725cfc2c64a621ae4d9e6d4fe5e5439fae55d8f4a75accb645. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/ES5931100531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd941566801c80dc649bf1a52328764f1b7857c1adec4f7b7a2a5880d53f776aa. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ES5931100525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb115be434a6af01f0248a6edad2567e36c61c3e7cc1fab18d2e395d5c4afca. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES5931100526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378f05e4c555a8f3bc5c43490cb6de125c52d30131bb6f7bfd329f74bb95a18c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES5931100529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de75be2ca0d7d851a5077308be619ff7416e83ce518ddf58d47d75db0720461. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES6671301637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dcebcb24c1ed602bddcc41dc5ff1d32c93ee7727e7ef40c67cb4aee7196ea2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES6671301649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd2e1737969dd1afc8565923d1b8bb57ff955491837141db2735282b748f603. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/ES6671301651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684d88fdb3e05390865f741d7e998bc8251c799ece22d6229c6b5eb470963f8d. 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/ES6671301653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8601ce7736f847b0ac05b5b202be5a91de203a8166cce5b463de01472b9b4e09. 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/ES6172121029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8601ce7736f847b0ac05b5b202be5a91de203a8166cce5b463de01472b9b4e09. 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/ES6172121029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ba64889a219000e1d7b16d477c645f35217878496bcd246362ce6799e8bb60. 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/QZ5AB2332122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d016b72ebe9a5a726cc7993e73863783e78691302f50d038ff24fef01e81ef. 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/QMFME2087288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0d23fb03d94ad6b405e8302302db942ce337f747f6080f81b240bed4d0e66d. 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/QM7282056625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fad348ec3a84155c289e1fda5b62313bbf22d58c443e2e6f7b6129db50e18b. 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/QM6N22099959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9493bab30f85c4baa18362a238bbf58b192057f762082a728f45328ff94bda0e. 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/QM6MZ2037139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1987a390caecaaf43fde1fe444adbd497991b7bbd2181eeb2b51100a3a39c871. 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/ES7311500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6d231f1a1904879b98fc131e14fef7cabbc95f0079e4f218f95ef7d0cb0a85. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5931100532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029cdbdd11268e348caaf1c49dd9111655ede5f31289b121b82c048f6d3f34f2. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/ES5931401096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5133e41546f61c9ba0b96d8b9c81f39df5c769dcab7ba14795c9d7df5f0ec7a7. 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/ES7311500066.
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 0x375a280af29ca0c5225dc595b86ec6a3b9c4fbd84bef2f0714e5d6c5033810c1. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/ES5931401078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda506ff9d9e5ae9877a56d722b0fbd8ab20fb88ec6b0b6c0b2012962a005beed. 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/ES5931100537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adc33a06a3a68c49245f928f8e42d90bc2f1885603cbefc928e520b99950604. 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/ES5930900144.