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 0x6da9cd53b9605434bc0adb270ab521f4e44bb612159172c61e56960d169f6d35. 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/4fa54634-041a-4322-aa08-81aeecb80591.json and https://artists.proofprofile.net/proofs/artist/4fa54634-041a-4322-aa08-81aeecb80591.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 0xe19d3d5e87f767e7774c74fe661885ff8ea4e48da1892e214c803a2c6cf900b0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US3DF1828708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3450198c7aa5ca582c37b3fe8b4e99501d29feff7d9c0091cbe686afd458a4b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US3DF1828709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82645d509a7b846ccd2b9620a6988a81ceb5cbc0fd2159f29e5acc4f75e8dbf1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US3DF1828711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147942606b49bfed0cc77618d2a78936b742dbc66251059d3249a48cd2a7fb54. 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/US3DF1828712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf93fd7c0440bde25ae33dba59a5e269288f75e0daf6b2c7f1167eb5fc336b50. 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/US3DF1828713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf893a37a8f128c6c055b7c1957ff819d3db3ddda9de7cce140f84ed8dfa85e45. 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/USANG2087643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbe7ea567f25fa5c9e215897f0180d7f985e0c7ee7062179825830a25f5ea60. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USANG2084655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3042c458ea6f15abcd4fea61a204449642dc43378e1b7a7eef86532f40d22362. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USANG2084659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8c6aaa2845b9986499b30eb9dec2a603453e454ba05f59c4ab4a9c32768150. 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/USANG2084660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a58c016ab7dcba63c605643d3fa49d75aa0ef5cec9388c84855834a1f8f1e0. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USANG2084520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092427de0857dd4c8a9fe6c9111bcf10e2958ccf23ef324cb86cd0d2326c132f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USANG2084521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6694e8d33e875af093e035463137ba7f9f85f43219322345c54de3576756ae18. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USANG2084529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bff0d6ee727480c3232a61764a19634453befd063c398797851339578acab11. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/USANG2084485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3eda1987786673010a7e9cc54e8a682cc7f0e7ffe8f8a8e61174132ccb2dee6. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USANG2084487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c00c6f1dfde3b65d46238c73cb26ca253843d607346f58e369423770cf96f8. 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/USANG2084493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa41c07696be95e95922c0fc2d2a2f469fbc1e4684ff433a35eed4ba3a90370. 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/QZHZ62115042.