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 0xbe9c1695ffe4f3c22a490ff44f4ee3edacdf6f8e76107164f0eb1b089b67e8f8. 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/6051e51b-3d24-49ce-bba7-4a81fffafe01.json and https://artists.proofprofile.net/proofs/artist/6051e51b-3d24-49ce-bba7-4a81fffafe01.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 0x6a779fe1c13612db690933442064ec3e408b1d9c4a6a24b397b7e25ca31f08be. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/USCGJ1438248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1326c3be93cd7e2c5e94cb102b96bd30c4e38e790eff4a9988b1192a0bedc2f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/USY281610331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf49e07dfdb22eeb6512f59858379220d91e254f5e9499511de7ce0fec102947. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USHM91407357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce53a25cdb5d54463fbd33f4d887c57278df98816dcb08a90aeb9228687c274. 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/USHM91407358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc659ed781986a4cfb24208035d61189fab90bbe86f6d4c060042a4ea5d87be30. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM91407363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0241e25eb3d99ca56276bee4771df2c9154e7700423529478bb48c35d8fe9f5f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USE830937603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41503d3476b66ab3343e55a8e856417f0a4fc061d8cbf1336ac30e20c0dda4d5. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USE830949508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d3ef66f7e35ebde8f8e18481d6c34ac926ac2df00d860239900235f06fa79f. 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/USE830969508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c09eef008ae15a402b46881bbd00e3220663061eb1f7a62e242e23ec37508f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USCGH1608426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9c3e28053ea8d86e8bed3fcd13989ac086674ed94717270fca17f673b52131. 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/USCGH1608428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691d37243436cf25754c04f0d220c14f240f4ed88b61cbf9c8db1c88fed24680. 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/USCGH1608429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ee595b9e9bf0f2f0e417dcb2633a3dd8e9b2859149d9cb37f4bcf3684fcd3c. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USCGH1608435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a554e9f03180307c280050ee68854709daec1facfb0c48f07fcf6b04e784dcc. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USE831582083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3ded3f9b7f6f643ea2573e17ccb6998531994557e0542a8e28257f81c118cc. 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/USE831594835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a6310806eebb96416904d2739c91798069eb9239d72813f7343beb5a8c7487. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ22B1760111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0245fc763492c71a4b545f29b6a33b8207330e0a9420e6314bc928cffc8c39. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZ22B1863112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadbfceaf5352be4cbbcfaf279ec940d997d245d98697c69a8771ff246406015. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZ22B1903681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e8e609495c404f86d1e9706446faa179597704799884c4ecafa32d0e64aeee. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZGWX2145249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac7a600f354ebab9e187a086b3f8526f6d04df05c35bfbe9c2d2972a2b1e065. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGWX2083348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e078274390f086f5445cf57321c9e28748c9e4ac1bbe56ede774185b954e4c. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZGWX2083326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7694942835e60c8c5c127ffd0c4d8f08dcf9ed94d0f41503d776b47d70e5ea16. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US7VG2342517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd1a5313ed800d8c98c1d5d3e62fe90b92e580d34b3388a3b9e285af96ed19e. 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/QZPJ32222899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5649fe9fa6e43aca95697bc9e3b9b8dbf449a654561dc60b7c9c4e7ec0f214. 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/PTNS11800018.